It depends on whether your application documents comply with the requirements of the patent law. Judging from the 75 yuan you paid, it should be a utility model or external design patent. Both patents do not require substantive verification. As long as there are no substantive defects and several corrections are made, they should be authorized. The authorization period is usually five to seven months. After authorization, you need to pay the registration fee, annual fee and stamp duty of 295 yuan, and you can obtain the patent certificate in about two and a half months.