21Vianet Group, Inc. is a carrier-neutral Internet data center services provider. The Company hosts its customers' servers and networking equipment and provides interconnectivity. The Company also provides managed network services to enable customers to deliver data across the Internet through its data transmission network and smart routing technology. The Company provides value-added services, such as content delivery network (CDN) services, virtual private network (VPN) services and last-mile wired broadband services. It offers public cloud services, private cloud and hybrid services. In addition, the Company also offers container-based data center service. The Company's service offerings include hosting and related services, and managed network services. The Company provides hosting and related services to house servers and networking equipment in its data centers and connects them through its data transmission network, and offers other hosting related value-added services.