Doesn't mean that the pass rate is high if you apply for a patent yourself?

It can be said that patent is a combination of technology and law. If you are a technical expert and a legal expert with rich experience, you can apply for it yourself. If you are not an expert and have no rich experience, you'd better find an agency. Personally, I think that if you apply for the patent examination guide at least three times, you will save the patent documents you wrote and get a wide range of protection. It can be said that it is not worth the candle to make the technical scheme public. The agency is a technical expert as well as a legal expert.