In the global context of the Green Consensus, the financial industry is also gradually moving towards green finance. Fibers are recognized as the greenest communication medium for many reasons. According to the research report of the German Ministry of Environment and Nature Conservation, optical communication emits only 2 grams of CO2 per hour, which is more than 50% lower than copper and wireless communication. Huawei FTTO simplified campus network solution by using optical fibers as communication media and extends optical fibers to desktop and every corner of a campus. With FTTO, financial campus power consumption would reduces 60% . The cost of cabling optical fibers can be reduced by 90% and the TCO of the entire network can be reduced by 30%.