How long will the waiting period of utility model patent application last?

If there is no problem with the application documents, the state will send you an authorization registration notice after 4-5 months, and then pay the authorization fee, annual fee and stamp duty, and you can get the license in about 3 months. If there is something wrong with the application documents, we have to wait for the rectification notice. There is no time limit for the examiner to issue the rectification notice. Sometimes it will be sent at one o'clock in more than 2 months, and some will be sent after half a year, depending on the examiner's mood.