This repository generates rule sets (RULE-SET) for the Clash Premium proxy tool, specifically tailored for users in China. The core of the repo is a GitHub Actions workflow (run.yml) that daily fetches domain and IP lists from multiple upstream sources (e.g., v2ray-rules-dat, domain-list-custom, dnsmasq-china-list, geoip) and transforms them into Clash-compatible YAML payload files. The output rule sets categorize domains into direct, proxy, reject, private, Apple, Google, GFW, etc. The codebase itself is minimal (only CI configuration) and the actual data artifacts are stored in a separate 'release' branch. The repository acts as a data pipeline, not an application, with the workflow serving as the sole processing logic. The pipeline is straightforward but effective, relying on standard Unix tools (curl, grep, perl, sed) for data transformation.