This is one of the most significant archaeological sites in China - the oldest walled city in China at 6300 years old. Transportation is not easy. If you are not going with a tour bus or driving a car yourself, here is what I did. Use Didi to book a seat on a small bus from ChangDe to LiXian 澧县。It takes more one hour and costs 25 Yuan. Then use DiDi again to ride a car to the park. Ask them to drop you off the museum. Same way in reverse back to ChangDe 常德 Enjoy!