When a bright sunshine accompanies us, nobody expected that we would be greeted with an unimaginable beauty in Gahai. On the grassland of Gahai at an altitude of 3,400 meters, lying quietly in the open sky, there is a lake rippling with blue waves. The largest freshwater lake in Gannan has hit our sight once without warning with its beauty, which makes me unforgettable all my life and can't bear to leave for a long time. There is no need for tickets before people trample on it. Long live a virgin lake without artificial development, from the Himalayan "orogeny", every detail retains the ancient and present history, every inch of grass and trees are invisible living fossils. Look, the powerful "Gahai Lake" stone towering under the blue sky and the Tibetan language on the back give people a feeling of spaciousness and vastness.