Yang Shu-chun, World Taekwondo Federation, Asian Taekwondo Union, and Wu Jingyu / 2010s
The disqualification immediately became an international scandal because the legality of the socks was disputed. World Taekwondo Federation officials argued that the older Velcro-fastened sensor socks were vulnerable to unauthorized additions and that only newer stitched equipment was permitted at the Games. Yang's coach and the Chinese Taipei equipment supplier countered that no clear suspension of the older model had been issued, that the socks had passed inspection, and that athletes in other weight classes had used the same type without punishment. Requests for the inspector's testimony and surveillance footage were rejected. Yang and Liu protested on the mat for roughly an hour before officials threatened to suspend the entire Chinese Taipei taekwondo delegation if they did not leave. Federation secretary-general Yang Jin-suk first declined to explain the ruling publicly, citing privacy, then accused Yang of a deliberate manipulative attempt to cheat. The Asian Taekwondo Union further inflamed the dispute by publishing an article titled “Shocking Act of Deception by Chinese Taipei,” which was later removed after Taiwanese hackers defaced the union's website. The episode became entangled with regional politics: Taiwanese politicians demanded an explanation, protests targeted South Korea and China, anti-Korean boycotts spread online, and some demonstrators burned a South Korean flag or refused service to Koreans. Supporters also alleged that Zhao Lei, a longtime mentor of China's Wu Jingyu, had engineered Yang's removal to clear the way for Wu's gold medal. That claim was never established and remains an unverified conspiracy theory, although the conflict's institutional consequences were real: on December 21, 2010, Yang received a three-month suspension for protesting, Liu was suspended for twenty months, and the Chinese Taipei Taekwondo Association was fined US$50,000 for negligence and wrongdoing.
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