My tour ends in Changsha, but I was told that the town of Zhenyuan is worth seeing, so I want to stop at Huaihua on the way the Zhenyuan. I read there is a 4 hour bus from Changsha to Huaihua. Can someone please tell me how to catch this bus and when does it leave Changsha? Also, what is the bus fare? Would appreciate any help I can get. Thanks.