Inheritors of Yellow River Chengni inkstone making check an inkstone body at Hengshan Village of Huagong Township in Mengzhou City, central China's Henan Province, on Dec. 6, 2019. As one of China's famous inkstones, the Yellow River Chengni inkstone was listed in the first batch of Henan provincial intangible cultural heritages in 2007. (Xinhua/Feng Dapeng)