Students attend a class at the Sangyuan Branch of Hongshuizhuang Central Primary School. Located at the foot of the Yanshan Mountains -- the major range to the north of the North China Plain -- the Sangyuan Branch of Hongshuizhuang Central Primary School sits in Luozhuangzi town, Jizhou district, Tianjin. Serving the nearby villages of Sangyuan, Nihe and Shangbaiyu, this small campus enrolls just 28 students, the lowest figure of any primary school in the district. On Sept. 1, 2026, the new semester began here with its very first class. [Photo by Li Ran / Xinhua]