Xie Bihua is a teacher of Waying school in Weining county, southwest China's Guizhou province. He teaches over 20 students alone. Located in deep mountains, Waying school was set up in 2009 to provide convenience to children who live nearby. For the past six years, Xie Bihua has taken all the responsibilities of the school, from teaching all the subjects to preparing meals for the students. Xie often worries about one thing - after his retirement, who will take over the job and take care of the children?