The swan goose's population is about 30,000 across the globe, one-third of which return to the Hulunbuir Grassland as promised.
About 'Journeys in Nature': Hulunbuir series
Being recognized as one of the world's four largest grasslands, Hulunbuir boasts the largest and most complete ecosystem in China. As the ancient poem goes, "Under the vast sky is the boundless wild. The wind bends the grasses low, where cows and sheep show."