Aliyun OSS (Object Storage Service) is a resource storage platform that facilitates data storage and access. However, our team has encountered an issue where some resources within the platform can be accessed from certain locations, while others cannot be accessed at all. This raises concerns about whether the problem lies with the Content Delivery Network (CDN) or the OSS itself. Further investigation is needed to determine the root cause of the issue and implement a solution to ensure seamless access to all resources.