Legal analysis: Generally, it includes: 1. In case of national emergency or extraordinary situation, such as war and natural disasters; 2. In order to meet the needs of public interests, that is, to meet the needs of national defense, national economy and public health.
legal basis: article 53 of the patent law of the people's Republic of China
? Under any of the following circumstances, the patent administration department in the State Council may grant a compulsory license to exploit a patent for invention or utility model upon the application of a unit or individual that has the conditions for exploitation: (1) The patentee has not exploited or fully exploited his patent for three years from the date when the patent right was granted, and for four years from the date when the patent application was filed; (2) The patentee's act of exercising the patent right is recognized as a monopolistic act according to law, in order to eliminate or reduce the adverse impact of the act on competition.
article 54? In case of national emergency or extraordinary circumstances, or for the purpose of public interests, the patent administration department of the State Council may grant compulsory license to exploit the invention patent or utility model patent.
article 55? For the purpose of public health, the patent administration department of the State Council may grant compulsory license to manufacture and export patented drugs to countries or regions that meet the requirements of relevant international treaties to which the People's Republic of China is a party.