In the Aershan National Forest Park, the temperature in the wild is minus 30 degrees, the windows are beautifully iced, wearing thermal underwear, shirts, fleece suits, down jackets, and jackets to keep out the cold. Almost all the rivers are frozen. Even so cold, there is a non-freezing river in the Aershan National Forest Park. It will not freeze because the water temperature is normal temperature and it is still a miracle.