The Sichuan Tibet highway is the modern upgrade of the ancient Sichuan Tibet line, the east of Chengdu, the capital of Sichuan Province, and Lhasa City, the capital of the Tibet autonomous region. It is composed of China's 318 National Road, 317 National Road, 214 National Road and 109 National Road. It is the steepest road in China. It is divided into the north-south line. There are some connections between the north and South lines, which are generally part of the Sichuan Tibet highway. The south line is the Sichuan Chengdu, Ya'an, Luding, Kangding, East Russia, Yajiang, Litang, Ba Tong, Tibet Mangkam, Zuo Gong, BondA, eight Lodge, Po min, Linzhi Bayi Town, Kombo, Mo bamboo industry card, and the total length of 2146 kilometers, belongs to the 318 National Road (East Shanghai people's Square, West to Tibet Zhong Nei highway camphor A part of the wood port). The southern line is a combination of Chuan Kang Road and kangzang highway with Kangding as its main point. There are many famous dangerous sections.

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