Mr. Yin received his B.S. in Mechanical Engineering from Beihang University in 1986, engaged in technical work of welding, engineering machinery and the like in a state-owned enterprise in 1986-1996, and worked in a German-funded enterprise as a mechanical engineer in 1996 - 2000. He qualified as a patent attorney in 2000, and started his professional career in 2001. He was named as a four-star agent by China Intellectual Property News in 2016. Mr. Yin has handled a great amount of patent applications, reexaminations, invalidation, litigation cases and patent strategic planning for enterprises in the fields of mechanical engineering, electrical engineering, materials science, optics, physics, chemistry, etc. He has rich experience in intellectual property agency and dedicates himself to helping private enterprises become bigger and stronger.