Is there a third-party SMS platform in Wu Hanyou that can send mass messages? What do you recommend?

China Telecom has a service called collaborative communication, which has a mobile version, short message sending and receiving function, and supports offline forwarding and sending short messages. In addition to the short message function, it can also realize the effective integration of voice, video, instant messaging, data and other communication functions, and provide customers with a functional, collaborative and convenient communication environment, thus achieving timely and efficient communication.