Video PlayerClose
Photo taken on May 31, 2019 shows the sewage treatment area of HBIS Group Tangsteel Company in Tangshan, north China's Hebei Province. (Xinhua/Mu Yu)
Xinhua Headlines: Tech know-how modernizes China's century-old industrial city
Source: Xinhua| 2019-06-23 17:44:22|Editor: mingmei