Xiong Chaogui, a 50-year-old handicapped man, teaches at a class in a rural primary school in Maguan county, Southwest China's Yunan province on Aug 13, 2014. Xiong is both the principal of the school and the math teacher for six-graders. The school has a preschool class and a class each for six grades, with 279 students, seven formal teachers and a re-employed retired teacher.