China's first sub-meter high-resolution optical transmission stereo mapping satellite Gaofen-7 was successfully launched at the Taiyuan Satellite Launch Center in the northern province of Shanxi. Compared with ordinary optical remote sensing satellites, Gaofen-7 can draw three-dimensional images, meaning that all the buildings in the world will be a series of three-dimensional models once it is put into use. The successful launch means that the status quo of the high-resolution stereo remote sensing image market relying heavily on foreign satellites will be broken, leading China into a new era of independent large-scale space mapping.