Mr. Xu joined Liu, Shen & Associates in 2005 and passed patent attorney qualification examination in 2012.He specializes in patent prosecution, re-examination and client counseling with a focus on electrical engineering, antenna, radar, automatic control, telecommunication, electronics, computer science，digital signal process as well as integration circuit design.

Mr. Xu had studied and researched in BeiHang University and China Aerospace Science And Industry Corporation, and had a master's degree in 1999. Before joining this firm, Mr. Xu worked as an engineer at China Posts and Telecommunications Industry Corporation and as a senior engineer at China Aerospace Science and Industry Corporation.