Pan Pingzhong enters the classroom carrying a stack of textbooks at a teaching point in Jieni Village of Rongjiang County, southwest China's Guizhou Province, on Feb. 25, 2019. Pan, 48, is the only teacher in the point who has been dedicated to teaching for nearly 28 years. At present, he is mainly responsible for teaching students in first grade some basic courses. Besides that, Pan also does lunch for them during teaching break. (Xinhua/Liu Xu)