The total length of the rural highway route from Tianzhu Pingdi to Dachuan is 12.806km, adopting the third-class highway standard, with a design speed of 30km/h, two lanes in both directions and a subgrade width of 8.0m
Dachuan is located in Tianzhu County, which is located in the east of Guizhou Province and is under the jurisdiction of Qiandongnan Miao and Dong Autonomous Prefecture.