U+F9D1 "六" CJK Compatibility Ideograph-# Unicode Character

U+F9D1 "六" CJK Compatibility Ideograph-# is a compatibility ideograph from the CJK Compatibility block, representing a variant form of the Chinese character for “six” (the standard character being U+516D or 六). This code point was primarily included for roundtrip compatibility with older East Asian character encoding standards, such as certain Japanese and Korean systems, where duplicated or slightly stylized forms of common characters were mapped to unique values. As a compatibility character, it is not intended for general use in modern text; instead, standard Unicode recommends using the unified CJK character for “six” when encoding the number, reserving U+F9D1 for historical or legacy data conversion purposes. Its visual appearance is identical or nearly identical to the standard character, and its inclusion ensures that text encoded in older systems can be accurately transformed to and from Unicode without losing information.