I am a dispatcher of a property company and work in a bank. I signed it once a year for four years. The contract will expire soon. It has been published recently.

What contract? Why do you want to sign for four years in a row, why do you want to sign every year, why not sign for four years at a time? If you sign a four-year contract at a time, that is, every four years, then everything you do is subject to a four-year contract. If you only sign a one-year contract, then you have the conditions and right to discuss salary increase and other issues with the merchants when the contract expires. Both parties agree to sign the contract, while one party disagrees and leaves without signing the contract. So it's not refusing to sign the contract.