How does the patentee give up the patent in writing?

In any of the following circumstances, the patent right shall be terminated before the expiration of the time limit:

(a) failing to pay the annual fee in accordance with the provisions;

(2) The patentee waives his patent right in writing.

Where the patent right is terminated before the expiration of the time limit, it shall be registered and announced by the patent administration department of the State Council.

The patentee can passively give up his patent right without paying the fee, or voluntarily give up his patent right with a written statement.