Upd: Mingliuextb Font
By the late 1990s, scholars realized that Unicode Plane 0 could not fit all known Chinese characters. Historians needed characters from ancient texts, bronze inscriptions, and minority languages (like Cantonese slang or Zhuang characters). Thus, was created on Plane 2.
Here are some text examples of characters found in the "Extension B" range. If your system has the font installed, they will appear as Chinese characters; otherwise, they may appear as blank squares (tofu) or question marks. mingliuextb font