Children play in a water park in Bozhou, east China's Anhui Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Liu Qinli/Xinhua)

Children play with water in a park in Bozhou, east China's Anhui Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Liu Qinli/Xinhua)

People enjoy themselves at an ice sculpture exhibition in Ruian, east China's Zhejiang Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Zhuang Yingchang/Xinhua)

People play in a water park in Bozhou, east China's Anhui Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Liu Qinli/Xinhua)

People enjoy themselves at an ice sculpture exhibition in Ruian, east China's Zhejiang Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Zhuang Yingchang/Xinhua)

Aerial photo shows people enjoying themselves at Liandao resort in Lianyungang, east China's Jiangsu Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Geng Yuhe/Xinhua)

Aerial photo shows people enjoying themselves at Liandao resort in Lianyungang, east China's Jiangsu Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Geng Yuhe/Xinhua)

Aerial photo shows people enjoying themselves at Liandao resort in Lianyungang, east China's Jiangsu Province, July 7, 2019. People across China cool themselves down in various ways during the Xiaoshu, or Lesser Heat, the 11th of the 24 solar terms which means the beginning of hot summer. (Photo by Geng Yuhe/Xinhua)