function number2Chinese(n) {
  if (!/^(0|[1-9]\d*)(\.\d+)?$/.test(n)) return '資料非法';
  let unit = '京億萬仟佰拾兆萬仟佰拾億仟佰拾萬仟佰拾元角分',
    str = '';
  n += '00';
  let p = n.indexOf('.');
  if (p >= 0) n = n.substring(0, p) + n.substr(p + 1, 2);
  unit = unit.substr(unit.length - n.length);
  for (let i = 0; i < n.length; i++)
    str 
 
+= '零壹貳叄肆伍陸柒捌玖'.charAt(n.charAt(i)) + unit.charAt(i);
  return str
    .replace(/零(仟|佰|拾|角)/g, '零')
    .replace(/(零)+/g, '零')
    .replace(/零(兆|萬|億|元)/g, '$1')
    .replace(/(兆|億)萬/g, '$1')
    .replace(/(京|兆)億/g, '$1')
    .replace(/(京)兆/g, '$1')
    .replace(/(京|兆|億|仟|佰|拾)(萬?)(.)仟/g, '$1$2零$3仟')
    .replace(/^元零?|零分/g, '')
    .replace(
 
/(元|角)$/g, '$1整');
}