50 Yuan Yu Yue (Three-River-Source National Park)

The Three-River-Source region in Qinghai Province is the headwater zone of the Yangtze, Yellow, and Mekong rivers — a plateau ecosystem covering roughly 395,000 square kilometers that supplies freshwater to an estimated 700 million people downstream. China designated it a national park in 2021, the first formal approval under a new national park framework that Beijing had been developing since 2013 to consolidate fragmented nature reserves under unified federal management.

This coin belongs to the series launched to mark that 2021 designation, with the 2023 issue continuing annual releases tied to the park's protected zones.