My colleague bullied me and left my job. I want to hack him with WeChat trumpet. He doesn't add me. I scolded him for verifying the information. Will he see it if it is sent successfully?

He will see it, but what's the point? He won't apply to be friends through you. I think you should learn a lesson. If your colleagues dare to bully you in the new unit in the future, you must not show weakness. He won't let you live a good life, and you can't let him live a comfortable life. At that time, if we want to slap him in the face, there is no need to do such a thing as Monday morning quarterback.