In this case, we can take measures to communicate with changan trust Company and consult the terms of the contract.

1. Communication with changan trust Company: You can contact the customer service department of changan trust Company to find out the reasons for not decompressing and ask what conditions are needed for decompressing.

2. Consult the terms of the contract: If the communication fails, you can consult the terms of the contract signed with changan trust Company to understand the rights and obligations of the other party. If there is a decompression clause in the contract, rights can be protected according to the contract terms.