Two-time Olympic gold medalist China's Zou Shiming (L) lands a left during his professional debut against Mexico's Eleazar Valenzuela in Macau, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (L) enters the arena before his professional debut against Mexico's Eleazar Valenzuela in Macau, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (R) waves to the audience before his professional debut against Mexico's Eleazar Valenzuela in Macau, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (C) celebrates victory after his professional debut against Mexico's Eleazar Valenzuela in Macao, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (L) poses during a press conference after his professional debut against Mexico's Eleazar Valenzuela in Macao, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (R) punches during his professional debut against Mexico's Eleazar Valenzuela in Macau, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (R) punches during his professional debut against Mexico's Eleazar Valenzuela in Macao, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming (R) speaks during a press conference after his professional debut against Mexico's Eleazar Valenzuela in Macao, China, April 6, 2013. (Xinhua/Cheong Kam Ka)

Two-time Olympic gold medalist China's Zou Shiming gestures during a press conference after his professional debut against Mexico's Eleazar Valenzuela in Macao, China, April 6, 2013. (Xinhua/Cheong Kam Ka)