The referee did violate the rules and failed to be fair.
U23 is the official competition of Asian Football Association (AFC). China and Uzbekistan compete for the right to qualify at the same time, and U23 is supervised by Uzbek officials, which really violates the "horizontal avoidance rule" in FIFA's Competition Management Regulations, which was clearly put forward by Havelange doctor of law in 1986.
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In international football, the appearance of avoidance rules can be traced back to 1966 World Cup. At that time, the English occupied the position of FIFA president and FIFA referee Committee chairman, and "guaranteed" England to win the final championship all the way. Since then, the South American Football Association has fought back with Asia, Central and North America and Africa to "overthrow" the monopoly position of the English in FIFA.
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1986, Alain Vig, a Brazilian with a doctor of law, was elected president of FIFA. Since then, "fair play" has become a major slogan advocated by FIFA.
Throughout the game, Iranian referee Faghani was on duty during the China-Qatar War, and there were three misjudgments in the game: two were missed judgments, and 1 was a soft judgment (the cards could not be played).
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For this game, the opponent's strong ability should not be the reason for the referee's bias. He Chao's foul is really too big, we don't deny it, but two fouls and two yellow cards are somewhat exaggerated. If the previous small misjudgment had no fundamental impact on the game, it was that He Chao's departure became a decisive penalty. The referee's misjudgment in the second half was basically unfavorable to the China team. Wei's ball was obviously out of bounds, and the referee reversed the penalty, including sweeping Qatar's leg before half-time, but this action did not get a yellow card. In fact, for Fagani, fans who have watched the Confederations Cup should know that the referee lost an obvious penalty in the semi-final between Chile and Portugal, but because Chile still won the game, it did not cause more controversy this time. His "fame" has already spread throughout international football.
Conclusion: The referee's partiality and misjudgment are unfair, because they don't respect the performance of both sides.