Randy Huntington has been part of China's athletics coaching team since 2009 and sprinter Su Bingtian's coach since 2014. He played a key role in addressing Su's starting stance, breathing and pacing technique, and helping him break the 10-second barrier in the 100 meters. Huntington also worked with Wang Chunyu, who ran the 800m in Tokyo. Reporter Cen Ziyuan will talk to the coach on Saturday after the track and field events at the Tokyo Olympics wrap up on Friday night, to get his thoughts on China's breakthroughs at the Games.