Does sending three identical short messages constitute a report?

This is illegal, but it does not constitute a crime. You can report the case to the local public security organ, or you can directly file a lawsuit with the local grass-roots people's court to stop the infringement and apologize. Frequent texting and phone calls will not constitute harassment, but serious ones will be punished. Whoever repeatedly sends obscene, insulting, threatening or other information to interfere with the normal life of others shall be detained for not more than five days or fined not more than five hundred yuan.