How can I find a patent partner?

The most efficient way is to check the enterprises that make related products online, and then negotiate with others with their own patents to see if there is any intention to cooperate.

In view of your supplement, I think it is more appropriate for you to make a phone call or interview in person, and you need to confirm whether the scheme is feasible and what economic benefits can be produced. If you simply send an email, it will generally be considered as spam or advertisement.