I saw on the Internet that Guangzhou Ding Yu Intellectual Property Consultant Co., Ltd. is a fraudulent company, right?
/This is the website of All-China Patent Agents Association. After you go in, there is an institution in the upper right corner.
Then enter the font size in the Organization Font Size.
Check whether it is a company with agency qualification. Anyway, this is only a preliminary investigation. Check whether it has the authority of patent agency.