2. Elements of intellectual property infringement: (1) Illegality is essential for intellectual property infringement; (2) In the constitution of intellectual property infringement, the fact (result) of damage is no longer a necessary element, which is one of the differences between intellectual property infringement and general civil infringement; (3) Because some acts of infringing intellectual property rights do not need to harm the results, it is meaningful to determine the causal relationship to determine the responsibilities of the infringer; (4) The constitution of intellectual property infringement is not based on subjective fault.