CASC is the prime contractor for building the space segment for China’s High-Resolution Earth Observation System. In 2013, Gaofen-1 satellite was launched successfully, marking that the High-Resolution Earth Observation System has begun its construction in a full scale. With the high-resolution satellites have been launched and put into use one after another, China’s ability of Earth remote sensing observation has increased remarkably, and the satellite data has been extensively applied in such areas as environment protection, land resources survey and monitoring, and disaster prevention and reduction. China will have established a steadily operational system with temporally-spatially coordinated, all-time, all-weather and global observation capabilities by 2020 or so.