If no contract is signed, it can be claimed that the wage difference is doubled without signing the contract, the social insurance is not paid, the agricultural can be compensated, and the urban household can be required to make up. In addition, it can be cancelled for the reason that the unit does not pay social insurance, and compensation is required. If your company unilaterally dismissed you, you need to collect evidence of your dismissal. If you have not taken the annual leave, the company needs to pay you the salary for the annual leave. Collect evidence of your work in the company, such as work card, work card (preferably stamped with official seal), work clothes, attendance, punch in records, entry forms, business forms, bank payroll records, and voice recordings of calls with the company. Attention should be paid to clarify the identities of both parties, such as "Manager Li Si, and I, Zhang San, have worked in Haida for three years..."), videos, witness testimony (all can leave the office) Social insurance payment records, during the period of employment, you can also shoot work photos, social security bureau insurance statements, go to the local tax bureau to print and seal the personal tax payment certificate, the temporary residence permit handled by the employer for you, ask the unit to give you a work permit, documents with your name and official seal, etc. With the above evidence, you need to go to the arbitration department to apply for confirmation of labor relations, double wage difference, compensation, and win the lawsuit.