diff --git a/util.go b/util.go
index 5ce4e88..93fbf6c 100644
--- a/util.go
+++ b/util.go
@@ -23,6 +23,34 @@ func FormatMoney(number int64) string {
 	return strconv.FormatInt(int64(num1), 10)
 }
 
+func FormatCNY(amountStr string) string {
+	amount, err := strconv.ParseFloat(amountStr, 64)
+	if err != nil {
+		return ""
+	}
+
+	var value float64
+	var unit string
+
+	switch {
+	case amount < 1000:
+		value = amount
+		unit = ""
+	case amount < 10000:
+		value = amount / 1000
+		unit = "k"
+	default:
+		value = amount / 10000
+		unit = "w"
+	}
+
+	// 去除末尾的零
+	s := strconv.FormatFloat(value, 'f', 2, 64)
+	s = strings.TrimRight(s, "0")
+	s = strings.TrimRight(s, ".")
+	return s + unit
+}
+
 func FormatFloat(f float64) string {
 	if int64(f*100)%100 == 0 {
 		return fmt.Sprintf("%d", int64(f))