Wen Guiyuan (R) and his son Wen Jianye teach pupils to sing ethnic Zhuang's trio folksongs at a primary school at Anshan Village of Mashan County, south China's Guangxi Zhuang Autonomous Region, Nov. 11, 2010. Wen Guiyuan, 84, and his son Wen Jianye have collected and created over 1,000 pieces of ethnic Zhuang's trio folksongs, the intangible cultural heritage in Guangxi Zhuang Autonomous Region. They put a lot of efforts to preserve the legacy and teach local villagers to sing the folksong. (Xinhua/Lu Bo'an)