
Tourists visit Yintan wetland of Yellow River in Lanzhou, northwest China's Gansu Province, Aug. 8, 2015. The area of wetland of Yellow River in Lanzhou has reached 552.9 hectares by June this year. (Xinhua/Chen Bin)

Tourists visit Yintan wetland of Yellow River in Lanzhou, northwest China's Gansu Province, Aug. 8, 2015. The area of wetland of Yellow River in Lanzhou has reached 552.9 hectares by June this year. (Xinhua/Chen Bin)