U+16F78 "𖽸" Miao Vowel Sign Rounded Er Unicode Character

U+16F78 "𖽸" Miao Vowel Sign Rounded Er is a combining diacritical mark used in the Miao script (specifically the Pollard Miao writing system) to modify the vowel sound of a preceding base character by indicating a rounded Er sound. This mark attaches to a Miao letter to denote a retroflex or rhotic vowel quality with rounding, similar to a sound found in the Hmu or other Hmongic languages. Its inclusion in Unicode allows for the accurate digital representation and preservation of Miao orthography, supporting written communication in minority languages of China and Southeast Asia.