How much does it cost for two people to travel from Shenzhen to Guilin in winter? (lasting 4 or 5 days). . . Is it better to join a tour group or go by yourself?

It depends on how you play. There is basically nothing in Guilin except two rivers and four lakes and cruise ships in Yangshuo. If you sign up for a tour, first of all, you are in a hurry because you will visit many scenic spots. Second, you will go out early and come back late. Third, people will have more fun and won't feel bored! ~ If you go by car/by yourself, you may not find interesting scenic spots and the tickets are expensive, but you will stay in places you think are good for a long time. If you sign up for a group tour, the fee is about 1500-2000. If the trip is smooth, if you stay comfortably, it will be around 3000-4000. It depends on your choice.