China WFOE severance pay – I want to quit my job

Hello everybody. So, that’s my situation. Working for a WFOE company for 2.3 years. I signed my contract for the first year, in this contract, I asked the company to add that it would be renewed automatically if not noticed. Before the end of the second year, the company made me sign a paper in which the contract would be terminated, with the promise that a new contract would be made. So now is 3 month that I work without a proper contract, but: – company pays reguralrly, taxes included – they renew my working visa AFTER the contract was expired – In the contract was written that I am entitled of 1 month’s salary for every year Now I want to quit the job, and I ask for a suggestion. I am pretty sure I can ask for at least the 2 months I earned. I read that a period of less than 6 months counts as half month’s pay. Is it true? I also read that the company should pay an additional monthly salary if they make you work without a contract. Is it true? Do you suggest checking with a lawyer BEFORE resigning? Are there any reliable layers in China (seems a silly question)? Many thanks!