Of course, the staff of the patent office will automatically assign you a patent number after handling your case!
During the National Day holiday these days, you may have received the authorization notice on the first day after the holiday, and your patent application number must be on the authorization notice!
In addition, you have to write your own application, the quality of your writing may be low or the technical scheme you invented may be immature, and you may modify or give up the patent right yourself, so you should know more about this field and recommend a company with "strong wisdom".