11-year dedicated experience on advanced electron microscopy; characterized the metals, ceramics, solar-cell based perovskites, semiconductor materials, and Li-ion battery oxides by using Cs-corrected S/TEM, conventional HRTEM, EDS, and EELS; alloys design; mechanical properties at multiscale; corrosion of materials; stability of materials at high temperature; 2-year hands-on experience of PVD/CVD; SCMOS technique; Vacuum technologies.