Will Huzhou Sinian Factory withhold wages from temporary workers?

Generally not.

Deductions will be made if the following circumstances occur: If the employee causes economic losses to the employer, the employer may require him to compensate for the economic losses in accordance with the labor contract. The compensation for economic losses can be obtained from the employee. Deducted from my salary, but the monthly deduction shall not exceed 20% of the employee's monthly salary. If the remaining salary after deduction is lower than the local monthly minimum wage, it shall be paid according to the minimum wage.

In order to prevent employees from resigning, some employers deliberately delay and deduct wages from employees, which is illegal.