What should I do if the labor contract is signed and I travel unconditionally?

Execute according to the contract. If an unconditional business trip is signed in the labor contract, it must be executed according to the contract. If a labor contract is signed with the company, and the relevant matters of business trip are clearly stipulated in the contract, such as the time, place and expenses of business trip, then rejecting the company's business trip request without the company's consent will violate the stipulations of the labor contract.