Students clean the playground at Shiliang Primary School in Dayou Township of Nanchuan District in southwest China's Chongqing, Sept. 2, 2019. Shiliang Primary School, composed of 2 teachers and 17 students, ushered in new semester on Monday. Tan Xingli and Liang Chengping are respectively in charge of the teaching work for 8 first graders and 9 pre-school students. Small-sized schools are boosted in recent years in the district to guarantee fair and quality education. (Xinhua/Wang Quanchao)