U+1D363 "𝍣" Counting Rod Unit Digit Four Unicode Character

U+1D363 "𝍣" Counting Rod Unit Digit Four is a numeral symbol from the ancient Chinese counting rod system, which was used for arithmetic calculations before the adoption of the abacus. This particular character represents the digit four in the ones' place, formed by a vertical arrangement of four horizontal lines, a convention that differed from the later Suzhou numeral system. In Unicode, it belongs to the "Counting Rod Numerals" block, which preserves these historical rod digits for scholarly and digital representation of early East Asian mathematics.