Is the invention patent a part infringement?

This should be analyzed in detail, depending on whether the parts involved are within the protection scope of patent claims. If it is explicitly protected in the claim, then the other party's use of this part will definitely constitute infringement. If this part belongs to the existing technology, it does not constitute infringement. Article 62 of the Patent Law of People's Republic of China (PRC) In a patent infringement dispute, if the accused infringer has evidence to prove that the technology or design implemented by him belongs to the existing technology or design, it does not constitute patent infringement.