Bayi or Chagyib District, formerly Nyingchi County, is a District of Nyingchi in the Tibet Autonomous Region, China. Bayi Town, the administrative capital of Nyingchi, is located within the district. Bayi is located in the middle reaches of the Yarlung Tsangpo River. Both steep cliffs and flat valleys exist in the area. The average altitude is 3000 metres above s…Bayi or Chagyib District, formerly Nyingchi County, is a District of Nyingchi in the Tibet Autonomous Region, China. Bayi Town, the administrative capital of Nyingchi, is located within the district. Bayi is located in the middle reaches of the Yarlung Tsangpo River. Both steep cliffs and flat valleys exist in the area. The average altitude is 3000 metres above sea level. "The lowest places are just around 1,000 metres above sea level."