Does the patentee give up his patent right in writing before the expiration of the time limit?

According to Article 44 of the Patent Law of People's Republic of China (PRC), 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.