Chuanxiong Guo is a Principal Researcher at Microsoft Research Redmond. Before that he was a Principal Software Engineering Manager at Microsoft Azure. He was a Senior Researcher at Microsoft Research Asia before he joined Microsoft Azure. His areas of interest include networked systems at large-scale, data center networking, cloud computing, systems availability and troubleshooting. He is among the first to start data center networking research. He has won several best paper awards for his research in data center networking. Several of his envisions including DCN virtualization, DCN monitoring, and ServerSwitch generated both academic and industrial impacts. Many of the systems that he has designed and implemented, including CloudBrain, RDMA/RoCEv2, Pingmesh, NetBouncer, DiffServ for data centers, are widely deployed in Microsoft production data centers, are running in millions of servers in data centers, and are indispensable infrastructure services and technologies for both Azure and Bing.