Yes, it can be inquired through the patent agency management system of the State Information Bureau. Legal patent agencies need to submit an application to China National Intellectual Property Administration to carry out patent agency-related business. According to Article 8 of the Measures for the Administration of Patent Agency, no unit or individual may apply for a patent as an agent, and the patent right shall not be declared invalid without permission. A company or firm that has no agency qualification in the market is the so-called black agency. If you are cheated by a black agent, you can report it to the local market supervision bureau.