Song Qingchun, the inheritor of Ni Gugu paints Ni Gugu 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. [Photo/Xinhua]