A man looks at an organic waste gas treatment device at an international environmental protection industry expo in Guangzhou, south China's Guangdong Province, June 26, 2018. More than 600 enterprises participated in the event that kicked off on Tuesday. (Xinhua/Lu Hanxin)
Int'l environmental protection industry expo kicks off in Guangzhou
Source: Xinhua| 2018-06-26 21:22:41|Editor: ZX
