We are accepting the application of postdoc researchers and Ph.D candicates, a CV is requested to my email (wuzz@pkusz.edu.cn) for the interested people. <br>Researcher in Peking University Shenzhen Graduate School. Our research focuses on surface modifications by PVD (including arc, sputtering, etc), ion implantation, and MAO (PEO), etc. The applications are hard coatings, friction, corrosion, thin film solar cells and all solid-state thin film lithium batteries, etc. The  website is http://web.pkusz.edu.cn/wuzz/