Is it a lie to recruit part-time hand-painted paintings in Zhengzhou?

I am an unemployed young man. Yesterday, I went to a handicraft room for a part-time job and paid 180, which is called the study materials fee. I signed a contract saying that the deposit can only be refunded in the form of a reward after completing 10 hand-painted paintings, and each painting must be paid with the deposit, which will be given to you together with the salary. However, it is difficult for hand-painted paintings to meet the qualified requirements. I asked the boss for a deposit but didn't give it! Said it was consumables. If you consume materials, you have to pay. An online survey found that there were many such hand-painted scams, and some students admitted that they were unlucky and gave their bosses hundreds of dollars for nothing.