Xiong Chaozhong (L) of China reacts during a WBC minimumweight title match against Hiroya Yamamoto of Japan in Wenshan, southwest China's Yunnan Province, Feb. 22, 2015. Xiong Chaozhong claimed the title. (Xinhua/Lin Yiguang)

Xiong Chaozhong (C) of China celebrates after defeating Hiroya Yamamoto of Japan in a WBC minimumweight title match in Wenshan, southwest China's Yunnan Province, Feb. 22, 2015. Xiong Chaozhong claimed the title. (Xinhua/Lin Yiguang)

Xiong Chaozhong (L) of China competes during a WBC minimumweight title match against Hiroya Yamamoto of Japan in Wenshan, southwest China's Yunnan Province, Feb. 22, 2015. Xiong Chaozhong claimed the title. (Xinhua/Lin Yiguang)

Xiong Chaozhong (L) of China competes during a WBC minimumweight title match against Hiroya Yamamoto of Japan in Wenshan, southwest China's Yunnan Province, Feb. 22, 2015. Xiong Chaozhong claimed the title. (Xinhua/Lin Yiguang)