private String getChineseNum(int num) {
        switch (num) {
            case 1: return "一";
            case 2: return "二";
            case 3: return "三";
            case 4: return "四";
            case 5: return "五";
            case 6: return "六";
            case 7: return "七";
            case 8: return "八";
            case 9: return "九";
            default: return "";
        }
    }