Children practice dancing in the Fancheng District of Xiangyang City, central China's Hubei Province, July 4, 2018. Children participate in various activities during summer vacation. (Xinhua/Yang Dong)

Children read books at Xinhua Bookstore in Baokang County of central China's Hubei Province, July 4, 2018. Children participate in various activities during summer vacation. (Xinhua/Yang Tao)

Children practice dancing in the Ganyu District of Lianyungang City, east China's Jiangsu Province, July 4, 2018. Children participate in various activities during summer vacation. (Xinhua/Shao Shixin)

A robot competition is held at Zhongming Primary School in the Yi'an District of Tongling, east China's Anhui Province, July 4, 2018. Children participate in various activities during summer vacation. (Xinhua/Guo Shining)

A child reads a book at Xinhua Bookstore in Baokang County of central China's Hubei Province, July 4, 2018. Children participate in various activities during summer vacation. (Xinhua/Yang Tao)