docs: private static boolean charReg(char charValue) {
  		return (charValue >= 0x4E00 && charValue <= 0XFFF) || //
  				(charValue >= 'a' && charValue <= 'z') || //
  				(charValue >= 'A' && charValue <= 'Z') || //
  				(charValue >= '0' && charValue <= '9');
  	}