Table tennis is a pure circle. Before the Sydney Olympic Games in 2000 (including the Sydney Olympic Games), the diameter of the ball used in international competitions was 38mm, and after 2000, the diameter of the ball used in international competitions was 40 mm

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Table tennis competition system

1 1 (2 1) was used for a long time, and even 100 was used at the earliest, and the best of five games (team) or best of seven games (single event) was adopted. The competition is divided into team and individual events (men's singles, women's singles, men's doubles, women's doubles and mixed doubles).

Competition type [1]

1, "International Competition"

2. "International competition"

Step 3 "open"

4. "Restricted Tournament"

5. "Invitational Tournament"

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Development history

From 65438 to 0927, the International Table Tennis Federation (ITTF) was formally established and decided to hold the first World Table Tennis Championships. The development of table tennis has roughly gone through three stages. Although the rackets used by early athletes have different shapes, they are all made of wood, and the hitting speed is slow. Small strength, not to mention any rotation; The play is monotonous, just pushing the ball around.

From 65438 to 0936, the 10th World Table Tennis Championships was held in Bogera, and the competition was in an amazing situation. Men's team championships were held in Romania and Austria. The game starts at 2 1 on Sunday. There are three chippers on each side of the clinker. Because of the same style of play and similar level, both of them adopted mushroom tactics, refused to stumble easily and tried to win from their opponents' mistakes. Is the game until 3 o'clock or 2: 2? According to local regulations, public places must be closed at 3 o'clock, which led to the intervention of the police. In the end, Austria won with 3 1 5-4.

1903, an Englishman Goodall invented the rubber racket, which strongly promoted the development of table tennis technology. From 1926 to 195 1, most players around the world use rubber bats with cylindrical particles on their surfaces. When hitting the ball, the elasticity and friction increase, which can make the ball rotate to a certain extent, so the defensive style of cutting off the rotating ball appears. This style of play has been popular in Europe for a long time, and many athletes have won the world championship with this style of play. The advantage of table tennis in this period was in Europe, among which Hungary scored the most outstanding. In the 1 17 world champions, they won 57 times, accounting for half of the European team. But this racket can only be mainly used for backspin. Everyone is here, dawdling, even if you win the championship, it doesn't make sense.

In the early 1950s, the Austrian invented the sponge racket, and the Japanese athletes' morality was used in world competitions, winning four championships in the 19 World Championships in one fell swoop, breaking the monopoly position of European athletes. Because Japanese players used this racket to create a long-range attack style, which has the advantages of strong forehand attack, high speed and great threat to serve and attack, and gradually replaced the European defense style with slow speed, weak rotation and weak attack, Japan won the advantage of table tennis in the 1950 s, from 1952 to 1959. Among 49 sub-world champions, Japan won 24 events. This is the first big improvement in table tennis.

table tennis

From 65438 to 0959, after Rong Guotuan won the men's singles championship in the 25th World Table Tennis Championships, China athletes began to enter the international table tennis arena. Gradually formed a "fast, accurate, ruthless, changing" technical style of the fast-break style. In the 26th World Championships of 196 1, China not only broke through Europe, but also defeated the Japanese player who won the secret weapon-"curling ball" and won the men's team world championship for the first time. And won the 27th and 28th men's team championships in succession. The advantage of China's near-table fast break is its close position, high speed, flexible action and free use of forehand and backhand, which is a great progress compared with Japanese long-distance draw. In 1960s, China's table tennis skills were in the forefront of the world, and its advantages were transferred from Japan to China. This is the second big improvement in table tennis.

With the development of table tennis in Japan and China, European athletes have learned from their failures. After nearly 20 years of hard work, they finally created an advanced style of play that suits them, that is, the combination of loop ball and fast break. The representative figures are Hungarian Crampa and Jonel. The combination of fast break and loop ball is based on forehand and backhand fast break as the main technique, backhand fast break as the initiative and forehand loop ball as the scoring means. Representative figures are Gehlsen of Sweden and Olovsky of Czech Republic. These two styles of play are characterized by strong landing point, fast speed, strong pulling and hitting ability, low pulling and high hitting, and large room for manoeuvre. Table tennis has developed to a new height, and its position and speed are closely combined. This is the third big improvement in table tennis.

Since the 1970s, due to the strengthening of international exchanges and learning, various styles of play complement each other, so that table tennis technology has been developed and improved faster. For example, China's near-table fast break, straight-shot fast break combined with loop ball, and horizontal-shot fast break combined with loop ball have all developed and innovated, and achieved excellent results in international competitions. The International Table Tennis Federation has 127 member associations and is one of the largest sports organizations in the world.

Starting from 1982, the decision of the International Olympic Committee to list table tennis as an official Olympic sport from 1988 has promoted the faster development of table tennis.

The development history of table tennis in China;

Table tennis was introduced to China from Japan. At first, Wang Daoping, the owner of a stationery store in Shanghai Sima Road, bought 10 sets of table tennis equipment from Japan and performed in the store. Therefore, more and more people buy and play table tennis, and this activity has been promoted in major cities. At that time, the table tennis racket was a wooden racket with a smooth surface, so it was difficult to make the ball rotate, so there were only two ways to play it: push and pull.

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Grasping method

Direct grip method

(1) Fast break grip. Before the beat, the second knuckle of the index finger and the first knuckle of the thumb are pincers, and the distance between the two fingers is 1.

~ 2 cm, the racket handle is attached to the tiger's mouth, and the other three fingers are naturally bent and attached to the upper end of 1/3 after the racket.

(2) Loop ball grip. The arc grip is basically the same as the fast break grip, except that the thumb and forefinger form a small ring, the other three fingers naturally overlap on the back of the racket, and the first knuckle of the middle finger abuts against the extension line of the racket handle.

Horizontal grip

A horizontal grip is like a handshake. The middle finger, the ring finger and the little finger naturally bend to hold the racket handle, the thumb is placed close to the middle finger on the front of the racket, and the index finger is naturally stretched and inclined on the back of the racket. In forehand attack, the index finger is slightly upward, and in backhand attack, the thumb is slightly upward.

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main sourc

1890, several British naval officers stationed in India came across that playing tennis on a small table was quite exciting. Later, they used a small hollow ball instead of a solid ball with little elasticity and a wooden board instead of a racket to play this novel "tennis match" on the table, which is the origin of the name table tennis.

Soon after its appearance, table tennis became a popular sport. At the beginning of the 20th century, the United States began to produce complete sets of table tennis equipment. It is the number one grip sport in the United States, with more than 200,000 Americans playing table tennis. At first, table tennis had other names, such as indoor tennis. Later, an American manufacturer created the new word "Ping-Pong" by the sound made when ping-pong was hit, and used it as the registered trademark of his patent. Ping-pong later became another official name of table tennis. When it spread to China, people created a new word "table tennis".

In Japanese, table tennis is called table tennis. Many words in table tennis come from tennis. The ball used for table tennis is called table tennis or table tennis, the table is called table tennis table, the table is called court, the net in the middle is called net support, and the table tennis bat is called table tennis bat.

Table tennis singles usually adopt two wins in three games or two wins in five games (2 1 minute per game), but in 200 1, it is changed to two wins in seven games or two wins in five games (1 1 minute per game). The so-called "game" is set in English. Serving is called serving.

Table tennis originated in Britain, and Europeans still call it "table tennis". It can be seen that table tennis developed from tennis. /kloc-At the end of 0/9, tennis was all the rage in Europe. However, due to the limitation of venue and weather, some college students in Britain move tennis indoors, using the dining table as a table, books as a net, parchment as a racket and playing around the dining table.

At the beginning of the 20th century, table tennis flourished in Europe and Asia. From 65438 to 0926, an international table tennis invitational tournament was held in Berlin, Germany, which was later regarded as the first world table tennis championship and the International Table Tennis Federation was established.

The extensive development of table tennis has greatly improved rackets and balls. The original racket was a slightly processed board, and later someone put a layer of sheepskin on it. With the development of modern industry, Europeans put rubber with rubber particles on rackets. In the early 1950s, the Japanese invented a racket with a thick sponge. The original ball was a rubber ball similar to tennis. 1890, British athlete Gibb brought back some celluloid balls from America as table tennis toys.

In all kinds of table tennis competitions. The most famous is the World Table Tennis Championships, which was originally held once a year. After 1957, it was changed to biennial.

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Related terms

Competition table

(1) The left and right half areas are also called 1/2 areas, and their direction is the batter himself.

(2) Near-net area refers to the area within 40 cm from the net.

(3) The bottom line area refers to the area within 30 cm from the end line.

(4) The middle area refers to the area between the near net area and the bottom line area.

(5) The boundary area refers to the area near the edge of the table.

Racket shape

Racket shape includes racket face angle, racket transverse degree and racket face direction.

(1) racket face angle: the angle formed by the racket face and the table top.

(1) The racket face is perpendicular to the table.

(2) The angle between the racket face and the desktop is less than 90 degrees.

(3) The angle between the racket face and the desktop is greater than 90 degrees.

(2) Racket crossing: the angle change of the racket caused by the back and forth rotation of the racket.

When the racket handle is perpendicular to the end line of the table, it is 0, and the left transverse angle increases as the racket rotates around the front and rear axes. When the handle and terminal wire

When parallel, 90 degrees to the left; When the racket turns right in the front and back axial direction and is parallel to the end line of the table, it turns right 90 degrees.

Semi-horizontal, that is, the levelness is 45.

(3) racket face direction: the angle formed by the racket and the end line of the table when it is deflected left and right.

Hitting route

The hitting route refers to the line formed from the hitting point to the landing point. The five basic lines (based on the batter) are: forehand diagonal line, forehand straight line, sideways diagonal line, sideways straight line and middle straight line. The straight ball in the middle is always determined by the position in the actual game, that is, chasing the ball, also called chasing the road in the middle.

Hitting point

The hitting point refers to the spatial position where the racket touches the ball at the moment of hitting the ball, which is related to the relative position of the batter, including the following three factors: ① the position of the ball in the front and back of the body; ② the distance between the ball and the body; ③ The position of the ball.

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match

Choice of serving, receiving and positioning

Table tennis serve

1. The right to choose the service, receiving service and venue should be decided by choosing the front and back of the coin. The right player can choose to serve or receive the service first, or he can choose to be on the side first.

2. When a player chooses to serve first or receive first or choose a court, another player should have another choice.

3. After each score, the receiver becomes the server, and so on, until the end of the game, or until the scores of both sides reach 10, the order of serving and receiving remains unchanged, and each person only serves one point in turn.

4. The party in one direction in a certain game should be changed to another direction in the next game. In the singles deciding game, when one side scores 5 points, it is necessary to change places.

Error handling of service and receiving orders and directions

1. Once the referee finds that the order of serving and receiving is wrong, he should immediately suspend the game and serve or receive the service according to the order established at the beginning of the game and the score on the field. In doubles, when mistakes are found, the game will continue in the order determined by the party who has the right to serve first.

2. Once the referee finds that the players should exchange places but not, he should immediately suspend the game and correct the players' positions according to the scores on the field in the order established at the beginning of the game before continuing the game. In any case, all the scores before the error is found are valid.

3. When the ball from the server touches the net, it is called "wiping the net". The referee should order the server to serve again. If you clean the net twice in a row, it is a foul and the scorer will deduct points.

Legal counterattack

After the opponent serves or returns the ball, the player must hit the ball so that the ball directly crosses or bypasses the net. Or touch the net device, and then touch the other desk area. In all the above cases, the counterattack is legal.

let

In a round without scoring, if the following circumstances occur, the service should be re-awarded:

1. If the ball sent by the server touches the net device when it crosses or bypasses the net device, it becomes a legal serve or is blocked by the receiver or his partner.

If the server or his partner is not ready, the ball has been served, and neither the receiver nor his partner has tried to hit the ball.

3. Due to the interference beyond the athlete's control, such as the lights going out, the athlete fails to legal serve, fight back legally or abide by the rules. (If an athlete collides with his partner or stumbles over the baffle and fails to fight back legally, it cannot be judged to serve again. )

4. The referee or deputy referee announced that the game was suspended. For example: ① due to the need to correct the wrong order or orientation of serving and receiving; (2) Because of the rotating serve method; ③ For warning or punishing athletes; (4) The result of a round of competition may be affected by the interference of the competition environment (such as an outside ball entering the field or a sudden noise that can surprise the athletes).

One point in a sentence

In this round of competition, except for the heavy service, one of the following situations will get 1 point:

1, failed to be delivered legally;

2. Failure to fight back legally;

3. shielding;

4. Hit the ball twice in a row (such as hitting the ball continuously with a clap thumb and racket);

5. Besides serving, the ball touches our table and then touches our table;

6. Hit the ball with an irregular racket face;

7. In doubles, players don't hit the ball in the correct order except serving or receiving;

8. the referee awarded points;

9, other illegal acts have been listed.

Give full play to

In a game, the winner is 1 1. After the score is tied 10, the winner is the one who scores 2 points first.

individual match

1, a game should use the best of seven or the best of five.

A game should be continuous, but any athlete has the right to ask for a rest time of no more than two minutes between games.

Spin serve

1, if a game 15 minutes later is still not over (unless both sides score at least 9 points); Or at any time before this, at the request of athletes from both sides, the rotation service method should be implemented. The timekeeper should open the watch when the first ball of each game enters the game state; Stop the watch when the game is suspended, and restart the watch when the game is resumed. The suspension of the game includes: the ball flies out of the competition area and returns to the competition area, wiping sweat, changing direction in the deciding game and replacing damaged competition equipment. A game doesn't end until 15 minutes, and the timekeeper should report "Time is up".

2. When the ball is still in the game, the referee will immediately announce the suspension of the game, and the server who has been suspended for one round will serve to continue the game. When the ball is not in the game state, the receiver of the last round will serve and continue the game.

3. When the above situation occurs, the counter should report the number of hits after each hit of the receiver. When using the rotation service method, the counter should report the number of people in English or other languages acceptable to athletes and referees.

After that, each player takes turns to serve one point until the end of the game. If the receiver makes thirteen legal counterattacks, the server scores one point.

Once the rotation serve method is implemented, the rest of the game must last until the end of the game.

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Venue standard

The Olympic table tennis competition will be held in the gymnasium. The specific standards of the gymnasium are as follows:

Competition area

It includes a formal competition venue with a standard size (8m wide,16m long, ceiling height not less than 4m) that can accommodate 4 or 8 tables (depending on the competition mode). The competition area should also include the channel next to the competition table, electronic display screen, athletes, coaches' seats and competition officials' areas (technical representatives, referees, arbitrators, etc.). ), photographer area, TV camera area and

lamplight

In order to ensure the clarity of the Olympic TV broadcast images, the illuminance is required to be 1500 ~ 2500 lux, and the illuminance of all tables is the same. If it is necessary to add a temporary light source due to TV broadcast and other reasons, the angle between the light source and the ceiling should be greater than 75 degrees. The illuminance of other parts of the competition area shall not be less than 1/2 of the illuminance of the competition table, and the light source shall not be less than 5 meters from the ground. Generally, the surrounding area of the venue should be dark, and the illuminance in the auditorium should be significantly lower than that in the competition area, so as to avoid dazzling light sources and natural light without covered windows.

ground

The floor shall be a wooden or movable plastic floor of brand and type approved by ITTF. The floor is elastic, and there are no other signs and signs of movement. The color of the floor should not be too light or too reflective, but red or crimson; Don't use too much oil or wax to avoid slipping.

temperature

The wind speed in the pavilion is controlled within 0.2 ~ 0.3m/s, and the temperature is about 20 ~ 25℃, or 5℃ lower than the outdoor temperature.

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specification of equipment

Ping pong table

The venue standard competition area should be surrounded by the same dark baffle with a height of 0.75m and separated from the adjacent competition area and spectators. The area of each table is 8m× 16m. There are tables, nets, balls, baffles, referee tables, referee chairs and scorers in the venue. At least two electronic scorecards should be used for each table, and four should be used for the final. Electronic scoreboards are placed on both sides of the table tennis court or on the back of the four corners, marked with the names of athletes, countries or regions, time, scores of each game, etc. So that the audience can see the score clearly on the display screen in the stands. There is also a large electronic display screen that can be clearly seen by all the audience in the gymnasium, which can display all the information about table games at the same time. In the final or when there is only one table, the referee uses a microphone to facilitate the audience to watch the game. Equipment specification sheet-76cm high, 2.74m long and1.525m wide, and the color is dark green or blue. Net-the height is 15.25cm, and the protruding part outside the table is 15.25cm, with the same color as the table. Ball-a white or orange, dull hard ball, 40mm in diameter and 2.7g in weight ... Baffle-0.75m in height and 1.4 or 2m in width, the same color as the table. All equipment is specially approved and designated by ITTF company. The same brand of equipment, including training facilities, must be used throughout the competition.

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Main tactics

Propulsion and attack tactics

Features: mainly use the speed and strength of forehand attack and backhand block, combined with the change of landing point and rhythm to suppress and mobilize opponents in order to win the initiative or score. Push-and-attack tactics are mainly offensive tactics with left push and right attack, and are often used by double-faced offensive players and offensive and cutting players with backhand push and block ability.

Method:

Grasping method

1, push left and attack right

2. Push and block sideways attack

3. After the sideways attack, the forehand pushes the block and pounces.

4. Left push combined with backhand attack

5. Push left, attack backhand, attack sideways and then forehand.

Precautions:

1, the push and attack must have changes in line, landing point and rhythm, which is the main method to gain initiative and create smash opportunities in push and attack tactics.

2. Generally, pushing is mainly to press the opponent's backhand, and then suddenly become a forehand to create an offensive opportunity. If the opponent's forehand is poor, you can push the opponent's forehand.

3. Suddenly push the other party in the push block, making it difficult for the other party.

Backhand stroke

Fight back hard, and then smash with forehand or sideways.

4. Decisive smash of the opportunity ball is the main means of scoring in the push and attack tactics.

5. Push and attack tactics should be close to Taiwan Province, but not to Taiwan Province. We should learn to change the position near Taiwan Province and Zhongtai, and master the rhythm of our opponents.

6. Push and attack tactics should adhere to the style of near-Taiwan, control the landing point with fast push and acceleration and deceleration, wait for an opportunity to smash the loop ball with near-Taiwan backhand or medium strength, and then enter the forehand for continuous attack.

Double attack tactics

Features: mainly use the speed and strength of forehand and backhand attack technology to suppress opponents, strive for initiative and create smash opportunities. Double-sided attack technique is the main tactic of double-sided attack to deal with offensive play.

Method:

1, attack left and right 2, attack two corner kicks and slam the middle.

Precautions:

1, forehand and backhand attacks need to have line changes and landing point changes to create smash opportunities.

2. Give priority to the opponent's backhand, and then attack the opponent's forehand or middle road to create a smash opportunity.

3. Boldly smash the opportunity ball.

4. In the case of active attack, double attack tactics should stick to approaching Taiwan, and in the case of passive attack, they can retreat appropriately and fight back in the vicinity or Taiwan.

5. Double-sided attack tactics should stick to the table, buckle the opponent's loop ball with a fast belt, wait for an opportunity to smash the loop ball with close-range backhand or medium intensity, and then turn to continuous attack.

Pull and attack tactics

Features: continuous use of forehand fast pull to create offensive opportunities, and then assault and smash as scoring means. Pull attack tactics are the main tactics of fast attack against chop tactics.

Method:

1, smash after forehand pull, smash after backhand pull.

Main projects:

1, the strength of the pull and buckle is very different, so that the other party can be caught off guard.

2, pull the ball to change the route and the landing point to mobilize the opponent, strive for the initiative, and create offensive opportunities.

3. When you meet an opportunity ball, you should boldly smash or assault it.

4. Be patient when using the tactics of pulling and attacking, don't rush for success, and don't be too fierce about uncertain chances.

Combined tactics of pulling, buckling and hanging

Features: It is a combination of pulling attack and putting short ball, which is a common tactic for fast attack against chopping.

Method:

1, put the short ball after the smash or assault of the offensive tactics.

2. Put the short ball into the attack tactics, combined with smash or assault.

Main projects:

1, the short ball should be put when the opponent is standing far away and the incoming ball is close to the net, so that the landing point of the short ball is easy to be close to the net, which can increase the distance and difficulty of the opponent's progress.

2. When you smash the short ball, if the opponent is close to the table, you can smash it in the direction of the opponent's body, which often makes it difficult for the opponent to give in and fight back.

Friction attack tactics

Features: mainly use "turn, low, fast, change" to control opponents, in order to find fighters, and then use low-sudden, fast or pull-ups to launch an offensive and enter a continuous attack; In the face of friction, the smash of the opportunity ball is often sudden, and you can often score directly. Rubbing and attacking tactics are indispensable auxiliary tactics in various table tennis.

Method:

1, forehand backhand rubbing with forehand quick pull, rush, assault or smash.

2, forehand and backhand rub with backhand fast pull, jerk, assault or smash.

Precautions:

1, the rubbing attack tactics should not only get up early as possible to win the initiative, but also be impatient, otherwise it is easy to make mistakes.

2. Bold smash when encountering the opportunity ball in rubbing is the main scoring method of rubbing attack tactics.

3. Putting short in the short rub can make it difficult for the opponent to attack first, so it is conducive to creating an attack opportunity to wait for a forehand, backhand or sideways attack.

Counter-offensive tactics of middle cut

Features: it is a combination of chopping and attacking, often focusing on turning and chopping, waiting for an opportunity to fight back; Or turn, low, steady, and change to force the opponent to attack while walking, in order to find an opportunity to fight back. This tactic has the characteristics of "forcing, changing, fierce and attacking" and is the main technology of combining attack and cutting.

Method:

1, forehand and backhand chop the ball and force the corner kick to cooperate with the opponent's right forehand attack or sideways attack.

2, forehand backhand cut two long corners, combined with forehand backhand counterattack.

Precautions:

1, forehand and backhand chopping should pay attention to the change of rotation intensity. Cutting and spinning the ball in a similar way after cutting and spinning is an effective way to make the opponent pull out the high ball and fight back.

2. When cutting the ball, try to reduce the arc as much as possible to avoid the opponent's smash or assault.

3. When cutting the ball and forcing the corner, you should properly cooperate with the other side's corner kick, so that the other side can hit the ball while walking.

Serve and attack tactics

Features: The tactics of starting first and attacking first are to increase the difficulty of the opponent's return of the ball by serving with different rotation, line, landing point and speed, make it look like an opportunity ball, or reduce the quality of the return of the ball, and then attack first to win the initiative or direct score. This is the main tactics and scoring means of all table tennis styles, especially the offensive style.

Method:

1, the engine spins down and "does not turn" the attack.

2, serve, backhand attack.

3, serve, backhand side up and down spin attack.

Precautions:

1, the service should have the change of line and landing point, so that the opponent can receive the service when moving back and forth, left and right.

2. Be prepared to attack after serving, so as not to lose the opportunity to attack.

3. You should know what kind of service you serve and what kind of technique your opponent may use to fight back. In this way, we can better prepare for the attack.

4, the attack should be as fierce as possible, but not too fierce, otherwise it will affect the hit rate.

Receiving and attacking tactics

Features: it is formed by a single attack technique and is aggressive. You can change the unfavorable position of receiving service into the active position, or you can score directly. It is the main tactic of table tennis, especially the offensive play.

Methods: Quick, quick or medium-intensity assault attack was adopted.

Precautions:

1, because the catch is an offensive play when the opponent actively serves and he is in a passive receiving position, which is more difficult. Generally speaking, you should not be too aggressive in serving and attacking. You should see clearly the direction, strength and height of the incoming ball and take appropriate measures to attack. For example, when the opponent's serve rotates downward, he should use the lifting technique when receiving the serve to avoid getting off the net. At the same time, the power of attacking the ball should not be too great.

2. After the attack, you should be ready for the opposite attack or continuous attack immediately to maintain the active position.

3. The smaller the strength of receiving, attacking and rushing, the more attention should be paid to the route or landing point of the ball, and generally the backhand of the opponent should be played more; If the opponent's backhand is strong and the forehand is weak, you can hit the opponent's forehand more.

Curl ball combined with fast break: Curl ball is the most popular style of play at present, supplemented by fast break, which may account for 80% of men. Generally, both sides are reversed. Such as world champions Wang, Zhang Yining and former national players Qiao Hong and He Zhili.

Fast break combined with loop ball: fast break is the main, loop ball is the auxiliary, and the occupation is closer than the former. Generally, one side is reversed, and the other side is positive rubber, raw rubber and long rubber (there are also positive rubber, raw rubber and long rubber on both sides). Such as world champions Deng Yaping and Chen Jing, world-famous Jin Xiangmei and Johny Huang.

Counterattack in the middle: passive chopping is the main way to counterattack. In 1950s, it monopolized the world table tennis. At present, there are fewer people engaged in this kind of play. The men's team is former national player Ding Song (attacking more and cutting less) and South Korean star Zhu Shihe, while the women's team is South Korean star Jin Jinge and national player Fan Ying.

At present, there is basically no such strange ball, and there is no definite definition. Generally, long glue cutting, knocking, arching, floating and other techniques are used to block the ball and wait for an opportunity to fight back (using reverse board technology). Representative figures are former national players Chen and Ni.

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Watching etiquette

Table tennis is a very delicate sport. During the competition, athletes' psychology and spirit are in a highly concentrated state, so athletes need to carefully observe the movement, time, position, racket shape, ball-coming operation and opponent's expression when hitting the ball with their eyes. Listen to the sound of the opponent's racket hitting the ball with your ears, so as to judge the rotation, speed, strength, landing point and rhythm of the ball, as well as the opponent's psychological state and possible tactics, and consider how to return the ball. Athletes' correct judgment of these situations and threatening to return the ball not only depend on their own ability, but also need a good competition environment. Therefore, watch the table tennis match should pay attention to the following points:

(1) During the period from the time when the athletes are ready to serve to the time when the ball becomes a dead ball, the whole stadium should be kept quiet, and no clapping, stamping the floor, shouting, cheering, walking around at will, displaying flags and slogans, etc.

(2) Don't take photos with a flash. Flash has a great influence on the table tennis match, because the collision between the table tennis bat and the ball is completed in an instant, and the flash will flash across the athletes' eyes, making them unable to judge the quality of the incoming ball, thus affecting the quality and hit rate of the return ball.

(3) Come on softly, and don't bring gongs, drums and horns into the gymnasium, because loud voices and excessive language will affect the mood and attention of athletes. Don't boo which side lost, or it will put pressure on the players, which is not good. And don't boo the referee.

(4) Smoking is prohibited in the venue; The phone is turned off or set to vibrate or mute.

I hope the landlord will adopt O (∩ _ ∩) O. Thank you.