(260602) -- BAYANNUR, June 2, 2026 (Xinhua) -- A postgraduate student from Inner Mongolia Agricultural University checks a bottle of water sample at the State Gauge and Research Station of Wetland Ecosystem of Ulan Suhai Lake in Urad Front Banner of Bayannur, north China's Inner Mongolia Autonomous Region, May 31, 2026. The Ulan Suhai Lake is the largest freshwater lake in the Yellow River basin. In recent years, local authorities have taken multiple measures to improve the ecology of the lake area. By making good use of the water replenishment from the Yellow River while strictly controlling sources of pollution, the lake's ecology has been improving year by year. (Xinhua/Li Zhipeng)
