A tourist experiences drifting at an amusement park in Heqiao Township of Xuyi, east China's Jiangsu Province, July 17, 2018. (Xinhua/Zhou Haijun)

Tourists play at a coastal resort in Lianyun District of Lianyungang, east China's Jiangsu Province, July 17, 2018. (Xinhua/Wang Chun)

Tourists experience drifting at an amusement park in Heqiao Township of Xuyi, east China's Jiangsu Province, July 17, 2018. (Xinhua/Zhou Haijun)

Children enjoy coolness at a swimming pool in Boxing County of Binzhou, east China's Shandong Province, July 17, 2018. (Xinhua/Chen Bin)

Children enjoy coolness at a water park in Chongqing, southwest China, July 17, 2018. (Xinhua/Wang Quanchao)

Citizens enjoy coolness at a water park in Chongqing, southwest China, July 17, 2018. (Xinhua/Wang Quanchao)

Citizens enjoy coolness at a water park in Chongqing, southwest China, July 17, 2018. (Xinhua/Wang Quanchao)

Children enjoy coolness beside a "boat" loaded with ice cubes at a water park in Chongqing, southwest China, July 17, 2018. (Xinhua/Wang Quanchao)