Double Olympic champion flyweight Zou Shiming of China works out in front of the media at the Venetian Macao hotel in Macau March 5, 2015. Zou will challenge undefeated International Boxing Federation (IBF) flyweight world champion Amnat Ruenroeng of Thailand for his first professional world title on March 7 in Macau. REUTERS/Tyrone Siu (CHINA - Tags: SPORT BOXING)