Does the invention patent need to pay an annual fee in the actual trial stage?

There is no need to pay an annual fee for an invention patent in the actual trial stage, and the patentee will pay the annual fee from the year when the patent right is granted. According to Article 43 of the Patent Law of People's Republic of China (PRC), the patentee shall pay the annual fee from the year when the patent right is granted. Article 43 of the Patent Law of People's Republic of China (PRC), the patentee shall pay the annual fee from the year when the patent right is granted.