Zi Collection, Upper Volume Radical: Cover (mì) Page 30, Entry 03 Pronounced xu (falling tone) Pronounced yu (falling tone) Pronounced hui (falling tone) Also written in a variant form (yī) Meaning: A flag. Refers to a marker sewn onto the back made of dark red silk. Also used interchangeably with the character "huī". Also, "Yùpiān" explains it as to wave. Also written as "huī". Zi Collection, Upper Volume Radical: Cover (mì) Page 30, Entry 04 Pronounced gu (falling tone) Meaning: The name of a type of flag.