Worked on infrastructure and packaging improvements across linuxdeepin/dde-shell and linuxdeepin/lastore-daemon. In dde-shell, addressed a build configuration issue by tightening the Debian Build-Depends constraint for dde-tray-loader-dev, ensuring only versions newer than 2.0.24 are used and preventing build failures from unintended downgrades. In lastore-daemon, refreshed the Deepin package manager’s mirror list by removing obsolete servers, adding new reliable HTTPS-enabled mirrors, and enforcing secure connections to enhance update reliability. Leveraged skills in Debian packaging, configuration management, and infrastructure maintenance, with a focus on repository hygiene, clear documentation, and traceable changes to support secure and stable software delivery.