The border of Sichuan is closest to the border of Chengduo County.

The nearest to the border of Chengduo County is shiqu county, Sichuan Province.

It is called Duoxian, which belongs to Yushu Tibetan Autonomous Prefecture in Qinghai Province and is located in the middle of Qinghai Province. It borders Qumalai County in the north and west, shiqu county in Sichuan Province in the southeast, and Yushu County in the southwest across the Tongtian River.

The territory is 160.25km wide from east to west and 209.25km long from north to south, with a total area of about15300km2. By the end of 2020, the total population of Yudu County was 67,000, including 56,400 in agriculture and animal husbandry, 0,600 in towns/kloc-0,600, and Tibetans accounted for more than 98%. There are also ethnic minorities such as Wenbao, Bula, Kana, Hume, Baima and Annie. There are tourist attractions such as Gazang Temple, Sexing Temple, Bula Temple and Seba Temple in Chengduo County.

According to the document published on the official website of Yudu County People's Government on July 20th, 2002, after five years of development, Yudu County's GDP reached 667 million yuan. On May 2019 15, Qinghai Provincial People's Government gave an official reply, and many counties withdrew from poverty-stricken counties. Top 100 clean water counties and cities in China in 2020. In August, 20021year, it was identified as a national key county for rural revitalization.