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.
Lantian County Lantian County () is under the administration of Xi'an, the capital of Shaanxi province, China. It is the easternmost and second-most spacious (after Zhouzhi County) of the 13 county-level divisions of Xi'an. The county borders the prefecture-level cities of Weinan to the northeast and Shangluo to the southeast, Lintong District to the north, Chang'an District to the west, and Baqiao District to the northwest.