Students read during a class at No. 4 Primary School in Hezuo city of Gannan Tibetan autonomous prefecture, Northwest China's Gansu province, Aug 27, 2019. (Photos: Xinhua)

A student plays football at No. 4 Primary School in Hezuo city of Gannan Tibetan autonomous prefecture, Northwest China's Gansu province, Aug 27, 2019.

Children read comic books at a teaching base renovated from a kindergarten in Gangkou village of Hongxingqiao township in Changxing county, East China's Zhejiang province, Aug 28, 2019.

Children recite the Three-Character Classic at a teaching base renovated from a kindergarten in Gangkou village of Hongxingqiao township in Changxing county, East China's Zhejiang province, Aug 28, 2019.

Wu Guoxian and students pose for a group photo in front of the teaching building at Gugang Primary School in Liuguang village of Longli county in Bouyei-Miao autonomous prefecture of Qiannan, Southwest China's Guizhou province, Aug 27, 2019.

Aerial photo taken on Aug 27, 2019 shows Wu Guoxian and students attending a flag-raising ceremony at Gugang Primary School in Liuguang village of Longli county in Bouyei-Miao autonomous prefecture of Qiannan, Southwest China's Guizhou province.

First graders exercise during the break at the Orphan School of Jilin Province in Changchun, capital of Northeast China's Jilin province, Aug 29, 2019.

First-grader Liu Yulin reads the text during a Chinese class at the Orphan School of Jilin Province in Changchun, capital of Northeast China's Jilin province, Aug 29, 2019.

First graders walk on campus with PE teacher Song Yang at the Orphan School of Jilin province in Changchun, capital of Northeast China's Jilin province, Aug 29, 2019.