Ding Ning (L) and Zhu Yuling of China pose during the awarding ceremony for women's doubles final at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu claimed the title by defeating Jeon Jihee and Yang Haeun of South Korea with 3-1 in the final. (Xinhua/Wang Dongzhen)

Ding Ning and Zhu Yuling (L) of China take a selfie photo during the awarding ceremony for women's doubles final at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu claimed the title by defeating Jeon Jihee and Yang Haeun of South Korea with 3-1 in the final. (Xinhua/Wang Dongzhen)

Jeon Jihee (L) and Yang Haeun of South Korea look on during the awarding ceremony for women's doubles final at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Jeon Jihee and Yang Haeun lost to Ding Ning and Zhu Yuling of China with 1-3 in the final. (Xinhua/Wang Dongzhen)

Ding Ning (Front) and Zhu Yuling of China celebrate during the women's doubles final against Jeon Jihee and Yang Haeun of South Korea at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu won 3-1. (Xinhua/Wang Dongzhen)

Ding Ning (L) and Zhu Yuling of China serve during the women's doubles final against Jeon Jihee and Yang Haeun of South Korea at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu won 3-1. (Xinhua/Wang Dongzhen)

Ding Ning (L) and Zhu Yuling of China are interviewed during the awarding ceremony for women's doubles final at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu claimed the title by defeating Jeon Jihee and Yang Haeun of South Korea with 3-1 in the final. (Xinhua/Wang Dongzhen)

Ding Ning (Front) and Zhu Yuling of China return the ball during the women's doubles final against Jeon Jihee and Yang Haeun of South Korea at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu won 3-1. (Xinhua/Wang Dongzhen)

Ding Ning and Zhu Yuling (front) of China return the ball during the women's doubles final against Jeon Jihee and Yang Haeun of South Korea at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu won 3-1. (Xinhua/Wang Dongzhen)

Ding Ning (L) and Zhu Yuling of China react after winning the women's doubles final against Jeon Jihee and Yang Haeun of South Korea at the 2018 ITTF World tour China Open in Shenzhen, south China's Guangdong Province, on June 3, 2018. Ding and Zhu won 3-1. (Xinhua/Wang Dongzhen)