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. In 1951, modern administrative structures formally integrated the area, initially establishing it as Nyingchi County. In 2015, it was upgraded to a district, adopting …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. In 1951, modern administrative structures formally integrated the area, initially establishing it as Nyingchi County. In 2015, it was upgraded to a district, adopting the name "Bayi", derived from the district’s main urban area, Bayi Town. This town, developed post-1950s, became a key logistical and transportation node due to its strategic position on the Sichuan-Tibet Highway.