Bring the fire to a boil, simmer slowly, and add enough water at a time, without adding water in the middle. The most important thing is what crucian carp to buy. If it is artificially fed in the vegetable market, it is not white, it has a faint yellow color, and the soup is thin and easy to deteriorate. Here I would like to recommend several well-known crucian carp varieties recognized by the whole country:

1. Carassius auratus

High-backed crucian carp (Carassius auratus) is a dominant population developed in Dianchi Lake and its water system in Yunnan Province in the mid-1970s. It has the characteristics of large individual, fast growth and strong reproduction. Named for its towering back. The largest individual is 3000 grams, which is hydrophilic and not suitable for breeding in the mainland.

2. Founder crucian carp

Founder crucian carp originated from Shuangfeng Reservoir in founder county, Heilongjiang Province, and is an excellent variety of crucian carp. Founder crucian carp has a dark gray back and a dark silvery white side and abdomen. The maximum individual weight 1.5kg is generally around 0.5 ~ 1kg.

3. Pengze crucian carp

Pengze crucian carp is an excellent variety of crucian carp bred by aquatic science and technology personnel in Jiangxi Province, with delicious meat, high meat content and rich nutrition. Full-bodied, easy to transport, easy to raise temporarily, easy to take the bait, which is conducive to the listing of live fish, and it is also a fish that can be developed in production and fishing.

4. Qihe double-backed crucian carp

Qihe double-backed crucian carp is named after it is produced in Qihe River, an east-west mountain stream in Qixian County, Hebi City, Henan Province. Qihe River is not frozen all year round. In June and February, the water temperature is still above 10℃, and the riverbed of Qihe River is overgrown with weeds. The excellent ecological environment has created favorable conditions for the growth and reproduction of crucian carp in Qihe River. Qihe crucian carp is tender and delicious. According to ancient records, Qihe crucian carp, together with seedless dates and shredded duck eggs, are the three major local tributes.

Among them, Qihe crucian carp is the only natural wild triploid fish with high protein and low fat, and its water quality is above Grade 2, which fully meets the drinking water standard. Since Shang Dynasty, it has been used as a tribute to the royal family. According to the provisions of the Wildlife Protection Law of People's Republic of China (PRC), the People's Government of Henan Province has officially announced it as the first in the list of key protected wild animals in Henan Province. (I won't go into details here, Baidu will know it once.) It is a rare treasure.

Personally, pregnant women are not advised to eat artificially raised crucian carp, which is not as good as wild crucian carp in taste and nutrition. More importantly, in order to sell well, artificially raised crucian carp will add a lot of additives, hormones and drugs to ensure a short growth cycle and a fast time to market. Ordinary people have no problem eating it, but it still has some influence on the health of pregnant women and babies. Secondly, some unscrupulous merchants on the Internet sell polluted artificially cultured crucian carp under the banner of "wild", "living water" and "free-range". Remember, crucian carp with good variety and quality does not need artificial breeding and stocking. The so-called carp breeding means putting several cages in the river, putting fry inside and feeding them to grow up. Although the taste is better than that of artificial fish ponds, the nutrition and taste are still different from those of wild ones, and they are essentially different from famous varieties. In addition, the safety of water quality is not guaranteed. Although it is a living river, we don't know whether it meets the standard.