Nanjing patent invalidation defense

If you have friends who are patent agents, you can ask them to help you write a patent application. Write it down and send it directly to China National Intellectual Property Administration. But my dad always does it locally, which is more convenient and quick. Some questions can be explained directly to you by the staff. But if you are not available, just send it directly. Of course, you can also ask someone you trust to do it for you.