Second-place-winner China's Wang Zhen celebrates after the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Wang Lili)

Spain's Miguel Angel Lopez (R) and China's Chen Ding (C) compete during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Yue Yuewei)

China's Wang Zhen (3rd R) competes during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Yue Yuewei)

China's Wang Zhen (R) competes during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Yue Yuewei)

Spain's Miguel Angel Lopez (R) competes during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Yue Yuewei)

China's Wang Zhen (R) competes during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Yue Yuewei)

Third-place-winner Cananda's Benjamin Thorne celebrates after the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Wang Lili)

Cananda's Benjamin Thorne celebrates during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Wang Haofei)

Athletes compete during the men's 20km race walk final at the 2015 IAAF World Athletics Championships in Beijing, capital of China, on Aug. 23, 2015. (Xinhua/Yue Yuewei)