Up to now, we have cooperated many times with major foreign universities and research institutes, including Tsinghua University, Peking University, Nanjing University, Shandong University, Zhejiang University, Fudan University, Shanghai Jiaotong University, University of Science and Technology of China, University of Electronic Science and Technology of China, etc. Chinese Academy of Sciences Institute of Physics, Institute of Chemistry, Institute of Semiconductors, Shanghai Institute of Technical Physics, Shanghai Institute of Microsystems, Shanghai Institute of Applied Physics, Institute of Silicate, China Academy of Engineering Physics and other scientific research institutes.