legal ground
Article 99 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC) shall be paid within the relevant time limit stipulated in these Detailed Rules; Failing to pay or pay in full at the expiration of the time limit shall be deemed as not making a request. The request fee for extending the time limit shall be paid before the expiration of the corresponding time limit; Failing to pay or pay in full at the expiration of the time limit shall be deemed as not making a request. The fee for changing the description item, the fee for requesting the patent evaluation report and the fee for requesting invalidation shall be paid within 1 month from the date of filing the request; Failing to pay or pay in full at the expiration of the time limit shall be deemed as not making a request. Article 34 In accordance with Article 31, paragraph 1, of the Patent Law, two or more inventions or utility models that belong to the general inventive concept and can be filed as one patent application shall be technically interrelated and contain one or more identical or corresponding specific technical features, in which the specific technical features refer to the technical features that each invention or utility model as a whole contributes to the existing technology.