Is the working hours of Changsha Telecom customer service double shift?

the working hours of Changsha telecom customer service are three shifts.

the working hours of telecom customer service are 24 hours, and each telecom customer service has an eight-hour working system. Interns take turns off (one day off last day, but the meeting lasts for 16 hours in two days), and ordinary employees work from nine to six.

there are customer service professionals who work the night shift (from 11: p.m. to 7: the next day) and those who work the night shift by turns, but they all follow the 8-hour working system and have endless holidays.