15199 km of the cargo carrier circuit and 15199 of the cargo carrier circuit in Cities in China

15199 km of the cargo carrier circuit and 15199 of the cargo carrier circuit in Cities in China

15199 km of the cargo carrier circuit in 34 Chinese cities

Find the longitude and latitude of 34 Chinese cities on the internet, calculate the sphere distance between cities, create a nearby connected graph, and use the touch hole Backtracking Method to Calculate the shortest time-out, the shortest one is the goods carrier circuit in three or four Chinese cities. Note that the distance between the 34 cities is different from the distance between the cities.

The figure below shows the carrier circuit of 34 Chinese cities.