Yi Radical Mop

It is a Yi dictionary-indexing sign.

Yi radicals group syllable characters in lookup tables. “MOP” is a Latin-letter label for a separate Yi syllable that shares this glyph shape; it is unrelated to the English cleaning word.

The syllable appears in running Yi text; this radical serves the lookup system. If it arrives alone in a message, treat it as specialist script text and ask for context before reading a social meaning into it.

how did the yi radical system develop?

Local Yi traditions came before the standardized Liangshan set.

Reported evidence for Yi writing includes bronze and stone items from the Western Han dynasty; surviving paper texts reach back to around the late Ming dynasty. Scholars still debate how some early forms relate to later ones.

Yi writing was preserved largely in religious, magical, medical, and genealogical manuscripts copied by bimo priests, Yi ritual specialists. Regional traditions developed different repertoires, shapes, orientations, and readings. Radical sets later helped readers look up Yi syllable characters; the standardized Liangshan set follows the organization of Chinese dictionary radicals, but Yi writing is a separate script.