As long as the suffocating side of this contract indicates that it is valid for two years, then this contract is valid because you signed it. Although the other party didn't tell you, if you have any questions about it, you should read the terms of the contract carefully before signing. There you are. You should have put it forward before signing the contract, but since you signed the contract, it means that you already know the above terms, and the terms are reasonable and there is nothing unreasonable, so the contract is valid.