Hello, Jindian Trademark will give you the answer:

Regular trademark agencies must be certified by the state! You can check it on the official website of the National Trademark Office.

Judging from the current market situation, cheap trademarks are priced at 5,000-1,000, mostly between 10,000-30,000. Some well-known trademarks are even more expensive, some even reaching hundreds of thousands. Many products that are said to be cheap online are mostly fake, because it usually takes 1-2 years to register a trademark by yourself.