The patent system is a legal system for protecting intellectual property rights of inventions and creations under market economy conditions. Article 9, paragraph 2, of the Patent Law stipulates that “if two or more applicants apply for patents for the same invention and creation, the patent right shall be granted to the person who applies first.” This is the “first-to-file principle.” Therefore, all inventions and innovations that meet patent conditions should apply for patents as early as possible to obtain national legal protection.