Tan Tian is deputy chief designer from DFH Satellite Limited Corporation. He got master's degree at Beihang University in 2003 and major is spacecraft design. He concentrates on spacecraft system engineering and system design since 2003. He has finished PRSS-1and ETRSS-1 as deputy chief designer. For now, he focuses on spacecraft mission analysis, system design and product assurance, especially in international spacecraft projects.