Yes, it's not easy to talk to the boss, and there is no financial source outside. Wait, say something nice. If he is reasonable, you can get together and part. If not, you can collect some information about what you are doing here, such as telephone recording, work card and work clothes. Anyone who can prove that you have worked here can sue him in the labor and social security bureau in the relevant area. According to the law, it is a fine to sign a contract and pay the arrears.