Foreign patent intermediary

That's right. Don't believe it easily.

In particular, it promised a ridiculously high price of millions and tens of millions ~ ~

Many patents have not been evaluated by intangible assets, and business people are very smart. How can they give so much money so rashly?

If you go through a patent agency, you can consult your agency; Be vigilant when you apply for a patent, just remember one sentence:

Never give money!