Fudan University is a very good school, so it is difficult to stay here. Unless you find a job and a company that can settle down, state-owned enterprises will be the mainstay.
Salary also depends on your major and your ability. The salary of fresh graduates is basically around1w.
How much money you can earn to support yourself in Shanghai depends on your quality of life needs and expenditure level. There are also many little girls earning five or six thousand yuan, and people can support themselves.