That depends on what patent.
The application fee for a patent for appearance or utility model is 500 yuan.
For invention patent, the application fee is 900+ publishing and printing fee is 50+ substantive examination fee is 2500.
Whether the patent is passed or not is decided by the patent office examiner after examination!
A patent must pay a complete application fee when it enters the examination procedure.
With the application fee, the patent can formally enter the examination process, and the examiner thinks that it can be authorized, and there is no reason for rejection.
If there is anything that does not meet the requirements, there will be corrective review opinions and so on.
If you can't overcome the defects, send a rejection notice!