QQ Sound Message is a voice value-added service provided by Tencent. Users can compose texts on their computers and send them directly to any telephone in China in the form of voice messages. Originally, it cost 1 QB per message, which could be paid through QB or mobile phone. Starting from November 15th, Tencent began embedding Mango Network audio advertisements in the customized text messages of users, while the service became free for users. It can be speculated that Tencent has naturally shifted the cost to the advertisers. Recipients of "Sound Messages" can directly connect to Mango Network's customer service hotline by pressing a button when they receive the sound message.