anlan expressway, that is, ankang-langao expressway, is an important part of the yinchuan-baise national expressway. it is also an important channel for strengthening communication and cooperation in the three economic zones of guantian, chengyu and yangtze river. it is of great and far-reaching significance for the mountainous transportation hub and logistics center to resolutely win the fight against poverty and build a beautiful and prosperous new security. 
the starting point of the ankang-langao (shaanxi-chongqing boundary) project is located at zhongcheng village, jianmin town, hanbin district, ankang city. a hub interchange is connected to the completed 10-day expressway, and the southern end of the route is located at the provincial boundary in the dabashan tunnel in langao county it is connected with the expressway in the chengkou section of chongqing. the highway has a total length of 91.340 kilometers, of which the designed speed for the section from ankang to langao is 100 kilometers per hour; the design speed for the section from langao to shaanxi-chongqing boundary is 80 kilometers per hour. the planned construction period of the project is 5 years, of which the section from ankang to langao is 47.83 kilometers long and is planned to be completed and opened to traffic in 2020.