Constantly optimized user experience is the core competitiveness of Internet vendors, but due to the bandwidth pressure of core data centers and transmission distance between visitors, it is difficult for networks to respond to user requests quickly.By providing services through geographically distributed CDN (Content Delivery Network) agents, we can optimize user experience while relieving access pressure on core data centers, reduce user bounce rate in a low-cost and highly available way, and guarantee service providers’ content delivery.