What is the reason for requesting invalidation of the patent?

The reasons for requesting the invalidation of a patent are: (1) the invention-creation does not meet the substantive conditions for granting a patent right; (two) the invention does not meet the conditions of legality; (3) It belongs to the field where no patent right is granted as stipulated in the Patent Law; (4) The writing of patent documents does not meet the statutory requirements; (5) The subject of patent right is illegal. Legal basis: Article 123 of the Civil Law of People's Republic of China (PRC), in which civil subjects enjoy intellectual property rights according to law. Intellectual property rights are the exclusive rights enjoyed by the obligee to the following objects according to law: (1) works; (2) Inventions, utility models and designs; (3) Trademarks; (4) Geographical indications; (5) Business secrets; (6) Layout design of integrated circuits; (7) New plant varieties; (8) Other objects prescribed by law. Article 444 Where intellectual property rights such as the exclusive right to use a registered trademark, patent right or copyright are pledged, the pledge right shall be established at the time of pledge registration. After the pledge of property rights in intellectual property rights, the pledgor may not transfer or license others to use them, unless the pledgor and the pledgee agree through consultation. The pledgor shall pay off the debts in advance to the pledgee or deposit the price for transferring or allowing others to use the pledged intellectual property rights. Article 600 Where a subject matter with intellectual property rights is sold, the intellectual property rights of the subject matter do not belong to the buyer, except as otherwise provided by law or agreed by the parties.