This website uses MiSans VF (MiSans Variable Font) by Xiaomi.
Official source: https://hyperos.mi.com/font/zh/
Official distribution: https://hyperos.mi.com/font-download/MiSans.zip
License: LICENSE.pdf (official MiSans Font Intellectual Property License Agreement)
FAQ: https://hyperos.mi.com/font/faq
The official variable TTF is losslessly packaged as WOFF2 for web delivery.
No glyphs, outlines, names, or variable axes have been modified or subsetted.