Please help me design two lines and how to get there.

I think it is most cost-effective to plan the trip and return trip together. Correctly, there is no such place as He Dan, but it should be called Hezhang.

The first route is Zunyi-Shibing-Tongren-Jiangkou-Shiqian-Meitan-Zunyi.

Zunyi takes the train to Shibing, Shibing takes the bus to Tongren, Tongren takes the bus to Jiangkou, Jiangkou takes the bus to Shiqian, Shiqian takes the bus to Meitan and Meitan takes the bus back to Zunyi.

The second route is Zunyi-Liupanshui-Weining-Hezhang-Zhenxiong-Bijie-Nayong-Zhijin-Anshun-Zunyi, and it is the most convenient to transfer from Bijie and Anshun.

Zunyi takes the train to Liupanshui, Liupanshui takes the bus to Weining, Weining takes the bus to Hezhang, Hezhang takes the bus to Zhenxiong, Zhenxiong takes the bus to Bijie, Bijie takes the bus to Nayong, Nayong takes the bus to Zhijin, Zhijin takes the bus to Anshun, and Anshun takes the train back to Zunyi.

As for the fare, there are no published data in these places, but they are all very close and the fare is not high. It is estimated that it is difficult for anyone to know the full fare of the whole journey.