Let us break down the name first. (黑体) is the Chinese term for a sans-serif or "black" typeface. In the Western classification system, it is the equivalent of a Gothic or grotesque sans-serif. SC stands for Simplified Chinese , indicating that the font contains glyphs for the Simplified Chinese writing system used in mainland China (as opposed to TC for Traditional Chinese). Medium refers to the specific weight—sitting comfortably between Regular (lighter) and Bold (heavier).
: Its open structure ensures that even complex characters with many strokes remain legible at smaller sizes. Digital Performance and Legibility Heiti sc medium font
You cannot use Heiti SC Medium in third-party apps like Word or Canva on an iPhone directly, because iOS restricts font installation. However, any app that uses the system font (like Notes, Pages, or Mail) automatically uses Heiti SC Medium when you set text to "System" weight Medium. Let us break down the name first