Do not search for “Heiti TC Medium font download” on random font sites. Instead, install Noto Sans TC or Source Han Sans TC from Google Fonts or GitHub. You’ll get a legally clear, high-quality Traditional Chinese medium-weight sans-serif that matches Heiti’s appearance and performance.

Heiti TC Medium (often stylized as Heiti TC Medium) is a specific weight of the Heiti typeface family, designed for Traditional Chinese characters. "Heiti" (黑體) translates to "Black Form," which is the Chinese equivalent of a Gothic or Sans-serif style in Latin typography—characterized by uniform stroke weights, clean lines, and a modern, neutral appearance.