Which borders Vietnam, Hekou Yao Autonomous County or Lhasa City?
Lhasa (prefecture-level city) Lhasa City is a prefecture-level city, formerly a prefecture until 7 January 1960, one of the main administrative divisions of the Tibet Autonomous Region of China. It covers an area of 29274 km2 of rugged and sparsely populated terrain.
Điện Biên Province Điện Biên (  ) is a province in the Northwest region of Vietnam. It is bordered by Lai Châu to the north east, Sơn La provinces of Vietnam to the south east, Pu'er City, Yunnan, China, to the northwest, and Phongsaly Province in Laos to the west.