Aerial photo taken on May 18, 2020 shows a cultural park in Chengguan District of Lanzhou, northwest China's Gansu Province. The Lanzhou municipal government's afforestation and forest conservation efforts since 2013 have achieved good environmental benefits -- the city's water resources improved, the urban climate was fine-tuned, and the amount of sand and dirt in the Yellow River also decreased. (Xinhua/Fan Peishen)
