I asked the agency to get the design patent. Up to May or so, they said it had been passed, and it would not be issued until the payment was made. The cost was 3 yuan. I signed it before.

This 3 yuan is the registration fee to be charged by China National Intellectual Property Administration.

It is an official fee and must be charged.

As for the 1 yuan you paid to the agency before,

you need to confirm how the contract with the agency was signed.

If it is only the agency fee, it does not include the above-mentioned official fee,

then there is no problem.

after the registration fee is paid to the patent office, the patent certificate will be received in about 1-2 months.