Recently, China Broadnet started the large-scale 400G deployment on its national backbone network. For this deployment, the company uses Huawei’s next-generation 400G OTN Kepler platform designed for the intelligent era and adopts the C6T+L6T all-optical switching (OXC) solution to build a high-quality all-optical transport network that delivers ultra-high bandwidth, ultra-low latency, and ultra-high reliability. In this way, China Broadnet achieves high-quality development of its services and lays a solid foundation for developing new productive forces.