What kinds of spam messages are there in China?

Domestic mobile phone spam messages are divided into the following four categories:

1, harassment type, mostly for some boring pranks;

2. Fraud, such short messages are mostly for cheating money, such as winning information;

3. Illegal advertising information, such as selling black cars and tranquilizer guns;

4.SP (short message service provider) sends information in violation of regulations, misleading short message service subscription, and the sending number is mostly SP access code.