If there is no reason to transfer and reduce salary, you can refuse.

Post adjustment and salary reduction belong to the content of changing the labor contract, and an agreement should be reached through consultation with the employee and a written document should be signed. If the employer unilaterally reduces the wages of the workers, the workers may apply for labor arbitration on the grounds that they have not paid the labor remuneration in full and on time, and demand to terminate the labor relationship and pay economic compensation. If you don't want to terminate the labor relationship, you can only ask for the salary difference.