Dong Xue, an inside-painting artist, shows an inside-painted snuff bottle at home in Shijiazhuang, capital of north China's Hebei Province, July 20, 2017. Inside-painted snuff bottle is a Chinese traditional handicraft. Inside-painting art, which has a history of more than 200 years, was also listed as one of the national intangible cultural heritages. Dong Xue and his daughter have continued to study the technique, and decided to pass on it. (Xinhua/Pu Dongfeng)