A worker taps a red stamp onto finished Baoning sweet steamed buns at a bakery in Langzhong, southwest China's Sichuan Province, Sept. 13, 2017. As a local intangible cultural heritage, the special steamed bun here gained great reputation in the area. For hundreds of years, the bun has been produced under 21 complete procedures, and finished with a red stamp proving the authenticity. (Xinhua/Liu Chan)
