You said that the questions you raised arise from the 12th divisional application and the 15th priority of the invention patent request. The answer is as follows:
Divisional application:
Answer: If this is the first time you file a patent application for your invention, leave this field blank;
If you have previously filed a patent application for this invention, this is a division of the case. application (usually occurs when an invention patent application is requested to be divided by the examiner due to unity issues during the substantive examination process), fill in the application number and filing date of the previous patent application here (this is recorded on the acceptance notice sent back by the Patent Office ).
Earlier application:
Answer: If this is the first time you file a patent application for your invention, leave this field blank;
If you have already applied for a patent before If you have filed a patent application for your invention (whether in China, the United States or other Paris Convention member states), you can request the priority of the case within 12 months, just fill in the relevant information here (for example, if you filed in 2007 If you filed a patent application for the invention in the United States on December 7, you can claim priority for the U.S. patent application in China before December 7, 2008. The advantage is that you can avoid the period from December 7, 2007 to August 2008. Documents published between December 7, 2019 and December 7th, 2020 affect the novelty of your patent application, and there are other aspects that are not detailed here)
It should be noted that if the priority of your country is requested, the priority of your country will be Earlier applications will be considered withdrawn.
About the font: You can use Song Dynasty size 5.
In addition, the English page does not need to be filled in or submitted, only the first 2 pages are required. The order of submission of documents is (from top to bottom): request letter (usually 2 pages), abstract, summary The drawings, claims, description, and drawings accompanying the description must be made in duplicate.
The above is just a simple reply, because it is too complicated to explain in detail. If you still have questions, you can check the "Review Guidelines" online.
I am a patent attorney. It is recommended that you entrust a patent firm to do the work. Please trust the professionals (although many employees in firms nowadays are not very professional).