In order to consolidate and improve the level of lens surface accuracy inspection by the incoming inspection staff and product technicians of quality assurance department, Li Sha, director of quality assurance department, conducted a training on lens surface accuracy inspection method for the above personnel on March 31. She mainly described the inspection procedures of lens aperture and Yasi, and explained the on-site operation and precautions in combination with the theory. Through the study of theoretical knowledge and combined with ordinary practical operation, the employees have a deeper understanding of the inspection methods, and the product technicians have improved their ability to analyze the poor performance of the lens through the study of on-site practical operation（ Contributed by: Quality Assurance Department)