Not included. You can manually install the .ttf files from a legitimate Apple source (you must own a Mac license) or use Noto Sans CJK SC as a functional alternative.
To use system Heiti fonts while providing robust fallbacks across platforms, prefer the system stack approach. Example CSS: heiti sc tc font
font-family: -apple-system, "Heiti SC", "Heiti TC", "PingFang SC", "PingFang TC", "Microsoft Yahei", "Noto Sans CJK SC", sans-serif;
Notes:
If you search for a combined "Heiti SC TC font," you are likely looking for a CJK (Chinese, Japanese, Korean) font that includes both simplified and traditional glyphs. Many modern typefaces (e.g., PingFang SC/TC, Noto Sans CJK) contain both sets. However, a strictly labeled Heiti SC font will not contain traditional characters, and vice versa. For documents requiring both scripts, you need a font that supports the entire CJK Unified Ideographs repertoire. Not included
A professional Heiti SC TC font typically supports: Notes: