Qinglin Yu used to be a senior engineer of CIOMP. During working in CIOMP for 30 years, she mainly worked on spherical and aspherical high precision processing. By the classical polishing process which is inherited from CIOMP, she processed many high precision spherical templates, compensating mirrors, quadric surfaces, high-order aspheres and aspheric mirrors. sHe also masters in polishing by high precision digital machine tools. The rate of finished products which are processing by her is pretty high, and the accuracy is guaranteed.