In March 2026, Li Xiaoguang developed Mermaid diagram rendering with a fullscreen viewer for the Tencent/WeKnora repository, enhancing the app’s Markdown capabilities. He integrated Mermaid.js by building a custom renderer for Mermaid blocks, ensuring diagrams could be displayed inline and in fullscreen with zoom, pan, toolbar, and export controls. Using JavaScript, Vue, and CSS, he configured rendering options to align with the existing Markdown pipeline, focusing on seamless user experience and maintainable code. This feature enabled interactive diagrams for documentation and design reviews, supporting cross-team collaboration. The work demonstrated depth in frontend development and thoughtful UI/UX design integration.