Mr. YANG has worked for several foreign patent agencies for more than ten years including the China Council for the Promotion of International Trade (CCPIT) Patent & Trademark Law Office, providing professional services for well-known customers both home and abroad in skillfully responding to Office Actions, filing reexamination requests and invalidation in Chinese, English, German, French or Japanese in the technical fields such as mechanics, electronics and chemistry. In 2007, he obtained the qualification of patent attorney, and he has joined the ALL-CHINA PATENT AGENTS ASSOCIATION (ACPAA).