During the summer vacation, children participate in colorful activities and enjoy the holiday time. (on August 10, in the city hall of Shijiazhuang, Hebei Province, students were watching the model of Zhaozhou Bridge to learn about the construction technology of the ancient bridge.) (on August 10, in the city hall of Shijiazhuang, Hebei Province, students were watching the model of Zhengding ancient building.) (on August 10, children learned the basic movements of roller skating in the citizens square of Nanchuan District, Chongqing.) (on August 10, children practiced roller skating in the citizens square of Nanchuan District, Chongqing.) (on August 10, at the new era civilization practice Institute of Fuyang sub district, Fengrun District, Tangshan City, Hebei Province, children performed shadow play under the guidance of shadow play artists.) (on August 10, in Hongguang Taigu mountain community, Zhenjiang City, Jiangsu Province, a child displayed the homemade dishes prepared under the guidance of volunteers from Jiangsu University.) (news agency)