Tencent Cloud VectorDB is a fully managed, self-developed enterprise-level distributed database service designed specifically for storing, retrieving, and analyzing multidimensional vector data. With support for multiple index types and similarity calculation methods, it can perform billion-scale single-index vector searches and sustain millions of QPS with a latency of just milliseconds. In addition to enhancing answer accuracy for large language models (LLMs) by serving as an external knowledge base, Tencent Cloud VectorDB finds extensive applications in AI domains such as recommendation systems and natural language processing (NLP).