What is the call center in JD.COM? COM？

It is equivalent to a job similar to customer service.

Generally speaking, when there are more than three people specializing in this kind of traffic processing in the system, it can be considered as a call center. Usually, the staff in the call center are called business representatives (seats), and the group of business representatives is called business group (seat group). A call center can be composed of hundreds or even thousands of business representatives, and small businesses and small departments of large enterprises can also set up a small call center with only a few business representatives very economically as needed.