Is it illegal for Zhengzhou Institute of Comprehensive Utilization of Mineral Resources to recruit security guards 12 hours without rest days?

Labor law of the people's Republic of China

Article 36 The state practices a working-hour system in which laborers work no more than eight hours a day and no more than 44 hours a week on average.

Security guards can adopt a special working hours system, and their average working hours and average weekly working hours should be basically the same as the legal standard working hours. And shall be approved by the labor administrative department before implementation.

It is definitely illegal to work 12 hours a day without weekends. You can report to the labor inspection department to safeguard your rights and interests, and you can also file an arbitration or lawsuit to safeguard your rights and interests.