2259.0 kilometers.

According to Baidu Map query, Nanchong to Tibet is 2,259.0 kilometers long, and it takes 1 day and 18 hours to drive, passing through the Shanghai-Nie line and Linla Highway.

Tibet borders Xinjiang to the north, Sichuan to the east, Qinghai to the northeast, and Yunnan to the southeast. It borders Myanmar, India, Bhutan, Nepal, Kashmir and other countries and regions. With a land border of more than 4,000 kilometers, Tibet is an important gateway to China's southwest frontier.

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