Simply from the price point of view, I am sure that it is cost-effective to register myself. However, to register yourself, you must have certain professional knowledge, be able to inquire by yourself and judge the risks of registered trademarks by yourself. If you have this, you can consider registering yourself. The advantages of principal-agent are simple. It is more professional than you and can eliminate most registration risks. You don't have to worry about the process yourself, and you can also provide professional post-service and advice. From this perspective, the principal-agent is cost-effective. After all, it doesn't cost much to register a trademark as an agent now.