It's hard to get in. According to the recruitment conditions of optical fiber process engineers in Chang Fei, optical fiber process engineers in Chang Fei need to have a master's degree, major in information and communication engineering, material science and engineering, and above CET-6, which is very demanding and difficult to make progress. Chang Fei's coated optical fiber is a large core energy fiber based on PCVD process. It adopts special precision grinding and polishing technology, efficient cleaning and professional coating technology to realize efficient coupling and high energy transmission of optical fibers.