In what ways do China Telecom, China Mobile and China Unicom usually promote value-added services such as telephone packages to customers?

Telemarketing and telemarketing. How inefficient is manual telemarketing. There are thousands of numbers every day. How is it possible to be in a hurry There must be some kind of system. For example, we use the communication telemarketing system developed by Shenzhen Xunhu Information Technology in Shenzhen Unicom. Adopt automatic dialing function, with manual telephone interpretation and automatic voice introduction function.