To constitute patent infringement, the following conditions must be met:
1. There is a valid patent right that has been infringed.
2. Without the permission of the patentee
3. For the purpose of production and operation.
4. The behavior does not belong to the circumstances otherwise provided by law, and otherwise provided generally refers to the circumstances otherwise provided by the patent law, and refers to some restrictions on the exercise of patent rights stipulated by the patent law.