The employer who has not signed a labor contract shall pay you double salary, social security and economic compensation from the second month. The focus is on evidence, which needs to prove that you have a labor relationship with the employer. I suggest you call the labor inspection brigade and let them investigate. When the labor brigade comes, you take the initiative to report it and let it take notes, so that at least you can prove that you have worked here. As for how much time you have worked, you can use the principle of "the burden of proof is reversed" and issue it by the employer in arbitration or litigation, because everyone has to fill out an employment form when working in a place. This also proves your working hours, you have to sign the salary, and the salary payment form has to be issued by the employer to prove your monthly income.
"Inverted burden of proof" widely exists in the field of labor law. Article 6 of the Labor Dispute Mediation and Arbitration Law stipulates: "In the event of a labor dispute, the parties have the responsibility to provide evidence for their claims. If the evidence related to the disputed matter belongs to the management of the employer, the employer shall provide it; If the employer does not provide it, it shall bear the adverse consequences. " Paragraph 2 of Article 39 stipulates: "If the laborer cannot provide the evidence related to the arbitration request held and managed by the employer, the arbitration tribunal may require the employer to provide it within a time limit. If the employer fails to provide it within the prescribed time limit, it shall bear the adverse consequences. " Article 13 of the Interpretation of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Labor Dispute Cases specifically stipulates that the employer shall bear the burden of proof for labor disputes arising from decisions made by the employer such as dismissal, dismissal, dissolution of labor contracts, reduction of labor remuneration, and calculation of the working years of workers. The Notice of the Ministry of Labor and Social Security on Establishing Labor Relations stipulates: "The employer shall bear the burden of proof for the wage payment vouchers, social security records, recruitment registration forms, registration forms and attendance records".
I suggest that you spend an hour reading the Labor Contract Law and the Regulations on the Implementation of the Labor Contract Law, so that you can know in what ways the employer has violated your rights and interests, and also safeguard your legitimate rights and interests more comprehensively, so that you can benefit for life.
If the employer infringes on your legitimate rights and interests, pay attention to collecting evidence. This is very important if there is arbitration or litigation in the future.