diff --git a/app/hdl/hdl_demo.go b/app/hdl/hdl_demo.go
index d7dfada..53b9a6e 100644
--- a/app/hdl/hdl_demo.go
+++ b/app/hdl/hdl_demo.go
@@ -7,10 +7,15 @@ import (
 	"applet/app/utils"
 	db "code.fnuoos.com/zhimeng/model.git/src"
 	"code.fnuoos.com/zhimeng/model.git/src/super/implement"
+	"fmt"
 	"github.com/gin-gonic/gin"
 )
 
 func Demo(c *gin.Context) {
+	for {
+		mediumId := utils.GenerateUniqueRandomNumbers(8)
+		fmt.Println(mediumId)
+	}
 	appId := c.DefaultQuery("app_id", "")
 	masterId := svc.GetMasterId(c)
 	adUnitId := c.DefaultQuery("adunit_id", "")
diff --git a/app/utils/rand.go b/app/utils/rand.go
index 62563c0..61869aa 100644
--- a/app/utils/rand.go
+++ b/app/utils/rand.go
@@ -32,22 +32,16 @@ func RandNum() string {
 }
 
 func GenerateUniqueRandomNumbers(n int) string {
-	rand.Seed(time.Now().UnixNano()) // 初始化随机种子
-	numbers := make([]int, n)        // 创建一个切片来保存随机数
-	for i := range numbers {
-		j := 0
-		for {
-			b := rand.Intn(10) // 生成0-9之间的随机数
-			numbers[i] = b
-			for _, num := range numbers[:i] {
-				if num == b {
-					j++
-					break
-				}
-			}
-			if j == 0 {
-				break
-			}
+	rand.Seed(time.Now().UnixNano() + rand.Int63()) // 初始化随机种子
+
+	numbers := make([]int, 0, n) // 创建一个切片来保存随机数，初始容量为n
+	used := make(map[int]bool)   // 跟踪已使用的数字
+
+	for len(numbers) < n {
+		b := rand.Intn(10) // 生成0-9之间的随机数
+		if !used[b] {
+			numbers = append(numbers, b)
+			used[b] = true
 		}
 	}
 
@@ -55,5 +49,6 @@ func GenerateUniqueRandomNumbers(n int) string {
 	for _, v := range numbers {
 		numbersStr += strconv.Itoa(v)
 	}
+
 	return numbersStr
 }