Worked on the linuxdeepin/dde-file-manager repository to deliver Krita thumbnail generation support for the DDE File Manager, enhancing media preview capabilities for users handling Krita assets. Developed a new thumbnail creator in C++ that extracts embedded preview images from Krita (.kra and .krz) files using the minizip library, and integrated this functionality into the existing thumbnail factory and configuration systems. Registered support for the application/x-krita MIME type and updated size handling to accommodate large files. All changes were implemented with CMake and Qt, focusing on improving user experience and reducing manual effort in managing Krita file previews.