Zhang Wei gives poor students free English classes in Taiyuan, North China's Shanxi province, July 8, 2012. Zhang has been living overseas, and since his return he teaches the children living in the community English every weekend in this summer vacation. [Photo/Xinhua]

Children practice the pronunciation of English words during a class in Taiyuan, North China's Shanxi province, July 8,2012.[Photo/Xinhua]