Legal analysis: counterfeiting patents is an infringement, and counterfeiting registered patents is an illegal and criminal act. If the circumstances are minor, it is infringement, and if the circumstances are serious, it constitutes a criminal offence.
Legal basis: Article 216 of the Criminal Law of People's Republic of China (PRC). If the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention and shall also or only be fined.