For example, if someone only produces one part, another person only produces another part, and then a third person puts the two parts together, then the third person constitutes direct infringement, and the first two people constitute indirect infringement. Indirect infringement only exists on the premise of direct infringement. If there is no third party to put the two together to constitute direct infringement, then the first two are not indirect infringement.
One thing to note here is that indirect infringement can only be constituted by the elements of "intentional inducement, instigation and instigation". Let me give you an example. For example, there are two components in a patent, one is our commonly used light bulb strip, and the other is something new. If one person produces light bulbs, another person produces new things, and a third person makes patented products of light bulbs and new things. Then the third party directly infringes, but in this case, the person who produces the light bulb does not actually constitute indirect infringement. Why? Because although the light bulb is an integral part of the patent, there is no act of "deliberately inducing, encouraging or instructing others to implement the patent" in the production of this ordinary light bulb.