Xfinity is a high performance computing service platform designed and developed by Shanghai Supercomputer Center (SSC). It is a web-based overall solution that integrates HPC hardware, HPC software, job management, project management, data management, online pre/post-processing, billing and auditing, data analysis, technical support, consulting services and many others. Different from traditional command line, Xfinity provides a web portal for users to use HPC resources and services flexibly and conveniently. Also, Xfinity is a platform for SSC to provide technical support, users to share HPC knowledge and experience, and users to post problems and seek solutions.