The agent said: The patent registration fee is 200 yuan every year.

That's nonsense. Don't listen to them. I suspect this is a black intermediary, cheating you out of money. The registration fee only needs to be paid once when the authorization notice is received (together with the annual fee of the authorization year and generally the stamp duty of 5 yuan), and the patent certificate can be obtained in about three months. After that, you only need to pay the annual fee, and you don't need to pay the registration fee and stamp duty.

You can check the charges on the website of the State Knowledge Bureau.

Also, your annual fee of 90 yuan must have been reduced, usually for three years. Remember to pay the full amount from the fourth year, unless you issue a certificate of fee reduction then.

In addition, if it is convenient for you, you can go to the local patent agency to pay the fee yourself, and you will know when you ask. You can also pay by bank remittance, which is very convenient if you use online banking.