docs: public static String getFirstSpell(String chinese) {
  		if (StringUtils.isBlank(chinese))
  			return "";
  		StringBuffer pybf = new StringBuffer();
  		char[] arr = chinese.toCharArray();
  		HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
  		defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
  		defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
  		for (int i = 0; i < arr.length; i++) {
  			if (arr[i] > 128) {
  				try {
  					String[] _t = PinyinHelper.toHanyuPinyinStringArray(arr[i], defaultFormat);
  					if (_t != null) {
  						pybf.append(_t[0].charAt(0));
  					}
  				} catch (BadHanyuPinyinOutputFormatCombination e) {
  					throw new KnifeUtilsException(e);
  				}
  			} else {
  				pybf.append(arr[i]);
  			}
  		}
  		return pybf.toString().replaceAll("\\W", "").trim();
  	}