Excuse me, the company system stipulates that after the service inventor leaves his post, the patent award will be gone. Is it legal? It's better to have a French colleague.

Yes, it's legal.

Article 76 of the Detailed Rules for the Implementation of the Patent Law: A unit that has been granted a patent right may agree with the inventor or designer, or in its rules and regulations formulated according to law, the way and amount of rewards and remuneration stipulated in Article 16 of the Patent Law.

In other words, if there is an agreement, it will be agreed, and if there is no agreement, it will be rewarded by default.