Competitors swim during a swimming competition crossing the Yihe River in Linyi City, east China's Shandong Province, Aug. 7, 2018. Swimmers from across Shandong take part in the competition on Monday, which is the Chinese solar term "beginning of autumn" this year. (Photo: Xinhua)

Competitors arrive at the finish line during a swimming competition crossing the Yihe River in Linyi City, east China's Shandong Province, Aug. 7, 2018. Swimmers from across Shandong take part in the competition on Monday, which is the Chinese solar term "beginning of autumn" this year. (Photo: Xinhua)

Competitors swim during a swimming competition crossing the Yihe River in Linyi City, east China's Shandong Province, Aug. 7, 2018. Swimmers from across Shandong take part in the competition on Monday, which is the Chinese solar term "beginning of autumn" this year. (Photo: Xinhua)

Competitors swim during a swimming competition crossing the Yihe River in Linyi City, east China's Shandong Province, Aug. 7, 2018. Swimmers from across Shandong take part in the competition on Monday, which is the Chinese solar term "beginning of autumn" this year. (Photo: Xinhua)