Student volunteers help a reader (L) return books under the guidance of a parent volunteer (R) at the library of Xianghe County, Langfang, north China's Hebei Province, Aug. 3, 2019. Parents in Xianghe brought their children to experience the work of volunteers in the library during their summer vacation, helping them enjoy convenient reading there and culitivate their practical ability during the summer vacation. (Xinhua/Lu Peng)