Things in Changsha are not expensive. 30 yuan for three meals a day is enough for a person. If you eat well, the maximum is 200 yuan a day. The accommodation depends on which university you are admitted to. If you are in Hexi, you have more choices, 200 yuan.
It should be easy to find a room for one day, with rooms available for seven days. If it is Changsha University of Technology, it will be more embarrassing. It is far away from the city, and the Yuntang campus is a new campus, so the supporting facilities are not complete...Changsha
There is nothing special about the fun, mainly the snacks at Yuelu Mountain, Juzizhoutou, Pozi Street, and Lechao on Jiefang West Road.