Professor Lin Nien-sheng, a Taiwan compatriot, teaches children English at his free country school in Houjiao Village of Putian City, southeast China's Fujian Province, July 16, 2015. After his retirement, Professor Lin came back to his ancestral home, Putian City, and started a free school in his own house eight years ago. More than 70 children from primary school to senior high school come here during the summer vocation with university students volunteering to help. [Photo/Xinhua]