Which borders Vietnam, Hekou Yao Autonomous County or Lhasa City?
Hekou Yao Autonomous County The Hekou Yao Autonomous County () is an autonomous county in the southern part of the Yunnan province of China. It is part of the Honghe Hani and Yi Autonomous Prefecture and borders the northern Vietnamese town of Lào Cai. It was apparently known as Zhongcheng () during the Tang dynasty.
Lengshuijiang Lengshuijiang () is a county-level city in Hunan Province, China, it is under the administration of Loudi prefecture-level City. Located on the central Hunan, the city is bordered to the north and west by Xinhua County, to the south by Xinshao County, to the east by Lianyuan City. Lengshuijiang City covers 439 km2 . As of 2015， it has a registered population of 370,300 and a resident population of 342,700. The city has 4 subdistricts, 5 towns and a township under its jurisdiction, the government seat is Lengshuijiang Subdistrict (冷水江街道).