说明：  基于节约算法的邮路、邮车规划。在已知邮局间公路网情况下，对该区的邮政运输网络进行规划，以提高邮政运输效益。
(Saving algorithm-based postal routes, postal vehicle planning. In the case of the road network in the known post office, the area of ​ ​ postal transportation network planning, in order to improve the efficiency of postal transportation.)