Signed a formal contract in the hotel and worked as the head of the front office for two years. My salary has been reduced because the hotel needs to be audited. How can I defend my rights? .

It is a bit difficult to defend rights in general, because this sentence will be found in the current contract or employee handbook.

I voluntarily accept the post change arrangement and shift of the unit. If you had signed it, you wouldn't be blind.

And I don't know if your company is doing performance appraisal now, let alone being transferred if it fails to meet the standards.

The best advice is to consult your local labor rights protection department.