If you want to lie flat, don't want to work, and want a job with a monthly salary of 4,000 to 5,000, less social interaction and leisure, you can consider the following options:

1. Night security: Working at night, relatively leisure, relatively few social activities, and the possibility of a monthly salary of 4,000 to 5,000 is higher.

2. Warehouse manager: The warehouse work is relatively idle, and there is less social interaction. Some warehouses may need to work at night.

3. Librarian at night: The library has less leisure work and less social interaction at night, which is suitable for people who like a quiet environment.

4. Night Hotel Receptionist: I go to work at night, relatively idle, relatively less social, and my monthly salary may be around four or five thousand.

Please note that the specific job position and salary may vary from region to region and company, and further investigation and consultation are needed according to personal situation and actual needs.