On the question of whether it is legal for employees to work overtime

This practice is illegal, according to the provisions of the labor law, only the arrangement of labor of workers in accordance with the provisions of the legal standard working hours and the extended working hours permitted by law is legal and effective. Illegal legal standard and legally permissible provisions of extended working hours, the use of labor contracts to determine the working hours, although after consultation with the workers, the employees voluntarily, this provision of the labor contract is also invalid. Because Article 18 of the Labor Law stipulates that labor contracts that violate laws and administrative regulations are invalid contracts, invalid contracts are not legally binding from the time they are concluded, and invalid labor contracts are confirmed on the basis of legal provisions, not on the basis of voluntary or involuntary confirmation of the parties to the labor contract. In short, in violation of the legal standard time and the provisions of the law allows the extension of working time, the labor contract to determine the working time, although after consultation with the workers voluntarily, the terms of the contract is also invalid.