Chinese Number Converter

Numbers use ordinary simplified-Chinese wording in groups of four digits, with internal zeros. Negative values start with 负. The output is not financial uppercase, traditional Chinese, pronunciation, currency or an expression result.

0 → 零
-10 → 负十
10 → 十
101 → 一百零一
10001 → 一万零一
100000000 → 一亿
1000000000000 → 一兆

万 = 10000; 亿 = 100000000; 兆 = 1000000000000

The shared locale parser extracts numeric values rather than validating every input character. For example, 1e2 is recognized as 100, abc12def as 12, and 1/2 as two separate values. Every recognized finite value must be an integer within ±999999999999999; a fractional value or an out-of-range value rejects the whole conversion. Inputs over 100000 UTF-16 units or 10000 recognized values also fail; they are not truncated.