China Southern Airlines will open a round-trip air route between Urumqi, capital of Northwest China's Xinjiang Uygur Autonomous Region, and the county of Tashkurgan on Friday, which signals that Tashkurgan Khunjerab airport – China's westernmost airport and the first Xinjiang airport of ultra-high altitude – is set to officially open to traffic, according to a post on the WeChat account of the air carrier's Xinjiang subsidiary on Tuesday.