Optical fiber is the cornerstone of modern human information civilization and belongs to one of the new national strategic infrastructures. With the popularity of optical fiber communication, more than 99% of human video, voice, pictures, file data, etc. are transmitted through optical fiber. Without the support of optical fiber, mankind will instantly go back 50 years, we will have no network, no long-distance communication capabilities, mobile phone computer network failure; The video cannot be transmitted; 2G, 3G, 4G, 5G will all be reset to zero; The whole world will be unconnected; The entire world order will change.