A boy reads a book with a family member at a book store in Wuyi County in Hengshui City, north China's Hebei Province, July 9, 2019. Many youngsters spent their spare time in book stores during their summer vacation. (Photos: Xinhua)

Children read books at a book store in Wuyi County in Hengshui, north China's Hebei Province, July 9, 2019. Many youngsters spent their spare time in book stores during their summer vacation.

A girl reads a book with a family member at a book store in Wuyi County in Hengshui, north China's Hebei Province, July 9, 2019. Many youngsters spent their spare time in book stores during their summer vacation.

A girl reads a book with a family member at a book store in Wuyi County in Hengshui, north China's Hebei Province, July 9, 2019. Many youngsters spent their spare time in book stores during their summer vacation.

Children read books at a book store in Wuyi County in Hengshui, north China's Hebei Province, July 9, 2019. Many youngsters spent their spare time in book stores during their summer vacation.

Girls read books with a family member at a book store in Wuyi County in Hengshui, north China's Hebei Province, July 9, 2019. Many youngsters spent their spare time in book stores during their summer vacation.