How does Jiyuan Jinli 48 system work?

Each class is eight hours, and there is one class every three classes. Henan Jinli Gold Lead Group Co., Ltd. (formerly known as Henan Jinli Gold Lead Co., Ltd.), established in 2003, is a member of Henan Jinli Gold Lead Group, located in the county-level administrative division of Henan Province, and is an enterprise mainly engaged in the manufacture of chemical raw materials and chemical products. Jiyuan Jinli has a four-eight system, with eight hours in each shift and three shifts.