Is there a charge for learning from patents?

There is a charge for borrowing patents. According to relevant inquiries, public information shows that the patent royalties are determined by both parties through consultation, and there is no uniform provision. Royalty refers to a certain amount of royalties paid to the patentee by others other than the patentee when using the patent. The amount is determined by both parties through consultation in the implementation license contract, and the payment method is also determined through consultation between the user and the patentee.