BpmfZihiKaiStd is a Bopomofo IVS build of the Zihi Kai Std standard kai typeface: each Han character that has more than one Bopomofo reading carries Ideographic Variation Sequences and Private Use Area glyphs that render the character together with its reading. Input methods that implement the Bopomofo IVS specification, such as chinese/fcitx5-mcbopomofo in its Bopomofo font annotation mode, use these fonts to produce Bopomofo-annotated text for teaching material and publishing. The Han glyphs are licensed under CC-BY 4.0 and the remaining glyphs under the SIL Open Font License 1.1.