It should be illegal. If a unit wants to implement the comprehensive working system, it should apply to the labor department and can only be implemented after approval. This is mainly because the working hours are not very fixed, such as security, hotels and other catering services. Units that have not reported the comprehensive working system will all implement the eight-hour working system. That is, eight hours a day, no more than 44 hours a week, and weekends. If it is impossible to arrange rest, overtime pay shall be paid according to the regulations, which is 200% of the normal salary. If the normal working hours exceed 8 hours, overtime pay shall be paid, and the overtime pay shall be 150% of the normal salary. In this regard, you can complain to the labor inspection department, or you can directly apply to the local labor dispute arbitration Committee for arbitration with overtime evidence.