Medical device maintenance major. After graduating from Tianjin Medical University, he was a medical device maintenance engineer. My main work includes: manufacturing, maintenance and sales of medical devices. Tianjin Medical University (TMU), referred to as Tianjin University for short, is a university jointly established by Tianjin Municipal People's Government, National Health and Wellness Commission and Ministry of Education. It is a national "double-class" university, a national "2 1 1 project" key construction institution, and was selected as the national "20 18".