Foreword:
When building an AI gateway system capable of global, multi-region deployment and supporting dynamic cross-vendor routing, we quickly realized that merely stacking a set of regionalized clusters physically does not truly solve the numerous challenges of a distributed system.

The real technical challenge lies in the integrity and consistency of the link: When massive requests enter the system from different regions, traversing complex and fluctuating network conditions via multiple entry providers, how should the internal scheduling and control plugins of the gateway deeply collaborate with DCDN and regional gateway clusters? This directly determines whether the system can form a continuous, self-consistent, and highly controllable technical link in terms of "entrance stability," "cross-vendor scheduling capability," and "availability under extreme failure scenarios."