Tourists enjoy themselves on the beach in Rizhao City, east China's Shandong Province, July 21, 2018. (Xinhua/Dong Naide)

 

Tourists enjoy themselves at a water park in Lianyungang City, east China's Jiangsu Province, July 21, 2018. (Xinhua/Geng Yuhe)

 

A father and son play on the beach in Rizhao City, east China's Shandong Province, July 21, 2018. (Xinhua/Yu Fangping)

 

Tourists visit the Rizhao Ocean Park in Rizhao City, east China's Shandong Province, July 21, 2018. (Xinhua/Yin Zhaogong)