How to add a paragraph number in front of a patent

Plus ZL. In modern times, patents are usually documents issued by government agencies or regional organizations representing several countries according to applications. The current patent number in China starts with ZL, and its suffix is: application year number, patent application type, application serial number and computer check bit. Therefore, it is enough to add ZL before the suffix number of the patent number. Patents record the contents of inventions and creations, and in a certain period of time, a legal state has emerged, that is, under normal circumstances, patented inventions and creations can only be implemented by others with the permission of the patentee.