Aerial photo taken on March 19, 2021 shows a forestation project in Xiong'an New Area, north China's Hebei Province. The Xiong'an New Area has begun its large-scale development and construction, with more than 100,000 constructors working on over 120 major projects in the area. The "city of the future" is greeting a brand new look day by day. (Xinhua/Mu Yu)

Between 2017 and 2020, Xiong'an added more than 27,000 hectares of trees, raising its forest coverage to 30 percent.

"More trees have helped achieve cleaner air and a better environment," said Wang Zhi, a local forest ranger.

All-out efforts have also been made to restore the ecological environment of Baiyangdian Lake, an important wetland in the region. Over the past four years, local authorities have regulated more than 13,000 heavy-polluting enterprises, built new sewage treatment facilities and reduced fishery areas on the lake.