How to calculate the license fee for patent implementation?

How to determine the cost of patent licensing: Generally speaking, the patentee and the licensee will decide by themselves in the licensing contract, which can be determined according to the type and duration of patent licensing, the difficulty and cost of research and development of patented technology. Article 1 of the Patent Law of the People's Republic of China * * * The right to apply for a patent and the patent right may be assigned. Where a unit or individual in China transfers the right to apply for a patent or the patent right to a foreigner, foreign enterprise or other foreign organization, it shall go through the formalities in accordance with the provisions of relevant laws and administrative regulations. Where the right to apply for a patent or the patent right is transferred, the parties concerned shall conclude a written contract and register it with the patent administration department of the State Council, which shall make an announcement. The transfer of the right to apply for a patent or the patent right shall take effect from the date of registration.