Pornography, gambling, drugs, fake trademarks, religion, and politics. According to the query of relevant public information, among all the documents that cannot be printed according to government regulations, pornography, gambling and drug abuse are at the lowest level, and the first category cannot be printed. Counterfeit trademarks and packaging cannot be printed. Counterfeit products bring harm to the country and the people, and must be eradicated from the source of printing. Religion is complex, and religious propaganda materials are basically publications, and general printers are not qualified to print them. Political categories include political slogans, political pamphlets, and organizational documents.