If the labor contract it gives you stipulates that you earn more than 8000 a month, you can consider trusting it. Otherwise, you don't indicate the salary he will give you in the future, but only indicate how much you will be deducted, which is cheating. If he only pays you less than 5 thousand a month later, as a Ul designer, it is equivalent to not paying you, and you will work for him for nothing. So don't believe it.

Any unit can set a low wage standard for its employees, but it can't set a contract in advance and deduct more money from employees.