Guangyuan-Gansu Highway is a section of G75 Lanzhou-Haikou Highway (Lanzhou to Haikou) in the territory of Sichuan as one of vertical lines in national highway network.

Whole length of Chengdu-Lanzhou CLZQ-7 bid section line is 7.317km for main line, bid section starting and ending mileages are D K 1 2 4 + 0 4 2 . 9 8 5-D 8 K 1 3 1 + 3 6 0 (right line Y D 8 K 1 2 6 + 5 3 9 . 6 6 1-Y D 8 K 1 3 1 + 5 0 8).

Xi'an-Chengdu Passenger Dedicated Line No. 3 bid is newly constructed. The main line scope mileage is DK401+146～DK431+660 with total length of 30.295km. Main projects of the main line include 21 bridges as long as 10.382km,