Int'l Trade Fair on Environmental Protection held in Hong Kong

A visitor (1st R) listens to introduction of a waste water treatment device at the International Trade Fair on Environmental Protection in Hong Kong, south China, Oct. 26, 2017. The fair will be held from Oct. 26 to 29 at the AsiaWorld-Expo in Hong Kong, attracting about 340 exhibitors from 19 countries and regions. (Xinhua/Liu Yun)