Dark current suppression, surface control. According to Sydney's resume, Sydney's dark control refers to dark current suppression and surface control. Sydney, born in 1976, is the chairman of Wuxi Zhongke Dexin Sensing Technology Co., Ltd., a second-class researcher at Shanghai Institute of Technical Physics, Chinese Academy of Sciences, a part-time professor at Shanghai University, a doctoral supervisor, a vice chairman of Shanghai Sensing Technology Society, a member of chinese optical society Infrared and Photoelectric Devices Professional Committee, an expert in national key programs, and the head of major basic research projects. For the first time in China, Dr. Sydney and his team broke through the key technical systems such as material epitaxy, dark current suppression and surface control of extended wavelength InGaAs hyperspectral detectors. The performance of the device has reached the international first-class level, and it has been applied to Chang 'e-5 and Hotan-Wen-1 spectrometer.