diff --git a/init.go b/init.go
index 5f7625c..a46e5e9 100644
--- a/init.go
+++ b/init.go
@@ -1,7 +1,7 @@
 package kgo
 
 type IntUintBig interface {
-	~int | ~int8 | ~int16 | ~int32 | ~int64 | ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64
+	~int | ~int64 | ~uint | ~uint64
 }
 
 type IntUintFloat interface {
diff --git a/kg_str/arabic_convert.go b/kg_str/arabic_convert.go
index aebd82d..d766725 100644
--- a/kg_str/arabic_convert.go
+++ b/kg_str/arabic_convert.go
@@ -27,10 +27,11 @@ var (
 
 // ArabicToChinese 阿里数字转中文数字
 func ArabicToChinese[T kgo.IntUintBig](arabic T) string {
+	var maxSupportedNum T = 9999_9999_9999
 	if arabic < 0 {
 		return ""
 	}
-	if arabic > 9999_9999_9999 {
+	if arabic > maxSupportedNum {
 		return ""
 	}
 	var (
diff --git a/kg_str/arabic_convert_test.go b/kg_str/arabic_convert_test.go
index 39f948a..2979ee8 100644
--- a/kg_str/arabic_convert_test.go
+++ b/kg_str/arabic_convert_test.go
@@ -54,7 +54,7 @@ func TestArabicToChinese(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := ArabicToChinese(tt.args.arabic); got != tt.want {
+			if got := ArabicToChinese[int](tt.args.arabic); got != tt.want {
 				t.Errorf("ArabicToChinese() = %v, want %v", got, tt.want)
 			}
 		})