Is it reliable to apply for a patent and find an agent?

Professional people do professional things. If you know all about the whole patent application process, application document writing and defense, congratulations, you don't need to find an agency, but such people are a minority after all. If you can't, you still have to find an intermediary. Our intermediary won't eat you. Haha, once the contract is signed, there will be no problem. Agency companies also need to do long-term cooperation, not just buying and selling with one hammer, and will not mess around casually.