How does Tencent mobile phone housekeeper label harassing calls?

Open Tencent Mobile Manager-Protection Monitoring-Harassment Interception

Tencent's mobile phone housekeeper interception function includes three ways: accurate cloud interception, blacklist and keyword interception. Spam message interception is accurate, which is the most accurate mobile phone security software for spam message interception at present. Accurate cloud interception relies on the spam messages reported by tens of millions of users of Tencent mobile phone housekeeper to form a huge interception database, thus achieving accurate interception in the cloud.