Song Qingchun, the inheritor of Ni Gugu repairs a Ni Gugu artwork in Yangqitun Village of Liyang Township in Xunxian County, central China's Henan Province, Dec. 6, 2017. Ni Gugu is a kind of clay sculpture in Xunxian County which can make sound. It was enlisted as one of the national intangible cultural heritages in 2006. (Xinhua/Feng Dapeng)