1. It has been three years since the patent right was granted and four years since the patent application was filed, and the patentee has not implemented or not fully implemented the patent;
2. The patentee's behavior of exercising the patent right is recognized as monopolistic behavior according to law, so as to eliminate or reduce the adverse impact of the behavior on competitors;
3. 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 People's Republic of China (PRC) is a party.