A worker scoops newly-made vinegar at a traditional vinegar factory in Chishui, southwest China's Guizhou Province, Dec. 23, 2017. (Xinhua/Wang Changyu)

Vinegar stored in vats in the open air is seen at a traditional vinegar factory in Chishui, southwest China's Guizhou Province, Dec. 23, 2017. (Xinhua/Wang Changyu)