As the "first town at the source of the Yangtze River", Tanggula Mountain Town has always been responsible for guarding the source of the Yangtze River and building a strong national ecological security barrier. Since 2004, more than 100 households and over 400 herders in Tanggula Mountain Town have voluntarily relocated from the Tuotuo River to the planned new village in Tanggula Mountain Town, Golmud City, in response to the national policy of ecological protection for the Three Rivers Source. This new village is the ecological immigrant village - Changjiang Source Village. This time, let's go back to the grassland where they used to live and experience the grassland time there.(People's Daily Online \ Gan Haiqiong)