Hi, in the southern part of China, there is no heating system, since the temperature is usually above 0 celsius. If you feeling cold, you can ask the owner to open the airconditioner. The hostel is located near the railway station, it is easy to find a tour agency and joint a tour.

For your trip in Longsheng, you can either stay in the same hostel in Guilin and go to Longsheng in the morning and getting back in the evening, or you can also find a local hostel to stay.