Group of top talents who, under the impetus of the relevant national policies, responded to the wave of repatriation and took on the challenge and developed their own technology from scratch, and continuously improved their own technology to promote China's advanced technology to be self-reliance. Zhang Hai Chao and Li Dong Sheng were schoolmates. They even brought together technical talents from all over the world to overcome the difficulties and break through the blocking of the capital market represented by Huang Zhong Kai.