To venture into Tibet, there are several freeways:  Chuanzang Freeway ( Chengdu to Lhasa ), 1500miles (2330km); Qingzang Freeway ( Xining to Lhasa via Golmud ), 1191miles (1907km), Black surface up to standard, 12000 feet above sea-level, crossing Kunlunshan Mount. and Tanggulashan Mount.; Xinzang Freeway ( Yecheng to Pulan ), 903miles (1455km), highest freeway in the world with the highest place at 18105 feet above sea-level, along way there are five mountains with height over 15000 feet.; Dianzang Freeway ( Xiaguan to Markam ), 500miles ( 800km ); Zhongni Freeway ( China Tibet Lhasa to Nepal Katmandu ), 562miles ( 900km ); Entrance into Tibet by land will mostly take advantage of the Qingzang Freeway and Zhongni Freeway.