In pics: surface water treatment plant in Langfang, N China's Hebei

Technicians check the facilities at a surface water treatment plant in Langfang, north China's Hebei Province, March 21, 2018. Langfang, which lacks water resources, has made use of the country's south-to-north water diversion project and received 62 million cubic meters of diverted water since 2015. (Xinhua/Wang Xiao)