What time does the Liuzhou Tobacco Factory security guard work?

The security team works in three shifts, and the working hours have the following options.

1. The morning shift is from 8:00 to 16:00, the middle shift is from 16:00 to 0:00, and the night shift is from 0:00 to 8:00.

2. The morning shift is from 7:00 to 15:00, the middle shift is from 15:00 to 23:00, and the night shift is from 23:00 to 7:00.

3. The morning shift is from 7:30 to 15:30, the middle shift is from 15:30 to 23:30, and the night shift is from 23:30 to 7:30.