The Excalidraw CN plugin is an Obsidian tool that integrates the Excalidraw whiteboard with a default Chinese handwriting font. It allows users to create and annotate diagrams directly within Obsidian, with features like support for double links, Chinese handwriting, and advanced Excalidraw functionality. Users can easily link Obsidian notes and files within the Excalidraw canvas and use multiple canvas support. The plugin is designed for efficient visual note-taking and includes support for future enhancements such as custom fonts, mind maps, and cloud storage.