Cloud Object Storage (COS) is a distributed storage service launched by Tencent Cloud. It has no structure restrictions and is accessible via HTTP/HTTPS protocols. It can store massive amounts of data in buckets featuring unlimited storage space and no partition management requirements, making it especially suitable for a variety of use cases such as data delivery for CDN, data processing for CI, and data lake for big data computation and analysis. Moreover, it provides a web-based console, multilingual SDKs and APIs, as well as command line and graphical tools. It is readily compatible with AWS S3 APIs, allowing direct access to community tools and plugins with ease.