public static String formatSimple(long amount) {
		if (amount < 1_0000 && amount > -1_0000) {
			return String.valueOf(amount);
		}
		String res;
		if (amount < 1_0000_0000 && amount > -1_0000_0000) {
			res = NumberUtil.div(amount, 1_0000, 2) + "万";
		} else if (amount < 1_0000_0000_0000L && amount > -1_0000_0000_0000L) {
			res = NumberUtil.div(amount, 1_0000_0000, 2) + "亿";
		} else {
			res = NumberUtil.div(amount, 1_0000_0000_0000L, 2) + "万亿";
		}
		return res;
	}
@Test
	public void formatSimpleTest() {
		String f1 = NumberChineseFormatter.formatSimple(1_2345);
		assertEquals("1.23万", f1);
		f1 = NumberChineseFormatter.formatSimple(-5_5555);
		assertEquals("-5.56万", f1);
		f1 = NumberChineseFormatter.formatSimple(1_2345_6789);
		assertEquals("1.23亿", f1);
		f1 = NumberChineseFormatter.formatSimple(-5_5555_5555);
		assertEquals("-5.56亿", f1);
		f1 = NumberChineseFormatter.formatSimple(1_2345_6789_1011L);
		assertEquals("1.23万亿", f1);
		f1 = NumberChineseFormatter.formatSimple(-5_5555_5555_5555L);
		assertEquals("-5.56万亿", f1);
		f1 = NumberChineseFormatter.formatSimple(123);
		assertEquals("123", f1);
		f1 = NumberChineseFormatter.formatSimple(-123);
		assertEquals("-123", f1);
	}