Athletes compete during the Men's 5000m Final of 2019 Shanghai IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Wang Lili)

Cheng Chao-Tsun of Chinese Taipei competes during the Men's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Cheng Chao-Tsun took the second place with 87.12 meters. (Xinhua/Wang Lili)

Cheng Chao-Tsun of Chinese Taipei competes during the Men's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Cheng Chao-Tsun took the second place with 87.12 meters. (Xinhua/Wang Lili)

Cheng Chao-Tsun of Chinese Taipei competes during the Men's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Cheng Chao-Tsun took the second place with 87.12 meters. (Xinhua/Wang Lili)

Andreas Hofmann of Germany competes during the Men's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Andreas Hofmann took the first place with 87.55 meters. (Xinhua/Wang Lili)

Julius Yego of Kenya competes during the Men's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Julius Yego took the seventh place with 77.82 meters. (Xinhua/Wang Lili)

Andreas Hofmann of Germany competes during the Men's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Andreas Hofmann took the first place with 87.55 meters. (Xinhua/Wang Lili)

Athletes compete during the Women's 3000m Steeplechase Final of 2019 Shanghai IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Wang Lili)

Lyu Huihui of China celebrates after the Women's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Lyu Huihui took the first place with 66.89 meters. (Xinhua/Fang Zhe)

Lyu Huihui of China celebrates after the Women's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Lyu Huihui took the first place with 66.89 meters. (Xinhua/Fang Zhe)

Lyu Huihui of China celebrates after the Women's Javelin Throw of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Lyu Huihui took the first place with 66.89 meters. (Xinhua/Fang Zhe)

Xie Wenjun (1st R) of China and Omar McLeod (1st L) of Jamaica compete during the Men's 110m Hurdles of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Wang Lili)

Antonio Alkana (L) of South Africa comforts Omar McLeod of Jamaica after the Men's 110m Hurdles of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Omar McLeod took the first place with 13.12 seconds. (Xinhua/Wang Lili)

Antonio Alkana (L) of South Africa hugs Omar McLeod of Jamaica after the Men's 110m Hurdles of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Omar McLeod took the first place with 13.12 seconds. (Xinhua/Wang Lili)

Omar McLeod of Jamaica celebrates after the Men's 110m Hurdles of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Omar McLeod took the first place with 13.12 seconds. (Xinhua/Wang Lili)

Wang Yu of China competes during the Men's High Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Wang Yu took the first with 2.28 meters. (Xinhua/Fang Zhe)

Wang Yu of China competes during the Men's High Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Wang Yu took the first with 2.28 meters. (Xinhua/Fang Zhe)

Zhang Yaoguang of China reacts during the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Li Ling of China competes during the Women's Pole Vault of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Zhang Yaoguang of China competes during the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Li Ling of China competes during the Women's Pole Vault of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Li Ling of China reacts after the Women's Pole Vault of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Wang Jianan of China competes during the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Li Ling of China competes during the Women's Pole Vault of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Wang Yu of China competes during the Men's High Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Wang Yu took the first with 2.28 meters. (Xinhua/Fang Zhe)

Li Ling of China competes during the Women's Pole Vault of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Katerina Stefanidi of Greece competes during the Women's Pole Vault of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Katerina Stefanidi took the first place with 4.72 meters. (Xinhua/Jia Yuchen)

Zhang Yaoguang of China competes during the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Wang Jianan of China reacts after the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Tajay Gayle of Jamaica competes the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Tajay Gayle took the first place with 8.24 meters. (Xinhua/Jia Yuchen)

Tajay Gayle of Jamaica competes the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Tajay Gayle took the first place with 8.24 meters. (Xinhua/Jia Yuchen)

Tajay Gayle of Jamaica competes the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Tajay Gayle took the first place with 8.24 meters. (Xinhua/Jia Yuchen)

Wang Jianan of China reacts after the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Zhang Yaoguang of China competes during the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Huang Changzhou of China competes during the Men's Long Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. (Xinhua/Jia Yuchen)

Wang Yu of China competes during the Men's High Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Wang Yu took the first with 2.28 meters. (Xinhua/Wang Lili)

Wang Yu of China reacts after the Men's High Jump of 2019 IAAF Diamond League in east China's Shanghai Municipality on May 18, 2019. Wang Yu took the first with 2.28 meters. (Xinhua/Wang Lili)