How to apply for patent invalidation?

The form is on the official website of the State Patent Office. As a requester, it is generally necessary to submit a request (including an opinion statement) and relevant evidence. (It needs to be in duplicate). If you need an agent, why do you need to submit an invalid power of attorney? Within one month after submission at the same time, invalid fees need to be submitted. Mail it to China National Intellectual Property Administration Reexamination Board. Of course, electronic documents can also be submitted at present, so there is no need to make two copies.