https://jefferyzhifeng.github.io/ https://jefferyzhifeng.github.io/photo.html 2026-02-24T10:32:07+08:00 https://jefferyzhifeng.github.io/projects/VasTSD/ 2026-02-24T10:32:07+08:00 https://jefferyzhifeng.github.io/projects/VasTSD/static/pdfs/sample.pdf 2026-02-24T10:32:07+08:00