diff --git a/drivers/ilanzou/driver.go b/drivers/ilanzou/driver.go
index 1d8e5d36b09..63d86363962 100644
--- a/drivers/ilanzou/driver.go
+++ b/drivers/ilanzou/driver.go
@@ -147,7 +147,8 @@ func (d *ILanZou) Link(ctx context.Context, file model.Obj, args model.LinkArgs)
 	// get the url after redirect
 	res, err := base.NoRedirectClient.R().SetHeaders(map[string]string{
 		//"Origin":  d.conf.site,
-		"Referer": d.conf.site + "/",
+		"Referer":    d.conf.site + "/",
+		"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0",
 	}).Get(realURL)
 	if err != nil {
 		return nil, err
@@ -155,7 +156,12 @@ func (d *ILanZou) Link(ctx context.Context, file model.Obj, args model.LinkArgs)
 	if res.StatusCode() == 302 {
 		realURL = res.Header().Get("location")
 	} else {
-		return nil, fmt.Errorf("redirect failed, status: %d", res.StatusCode())
+		contentLengthStr := res.Header().Get("Content-Length")
+		contentLength, err := strconv.Atoi(contentLengthStr)
+		if err != nil || contentLength == 0 || contentLength > 1024*10 {
+			return nil, fmt.Errorf("redirect failed, status: %d", res.StatusCode())
+		}
+		return nil, fmt.Errorf("redirect failed, content: %s", res.String())
 	}
 	link := model.Link{URL: realURL}
 	return &link, nil
diff --git a/drivers/ilanzou/meta.go b/drivers/ilanzou/meta.go
index ed5b2edb52e..f15fc01a492 100644
--- a/drivers/ilanzou/meta.go
+++ b/drivers/ilanzou/meta.go
@@ -46,7 +46,7 @@ func init() {
 				bucket:     "wpanstore-lanzou",
 				unproved:   "unproved",
 				proved:     "proved",
-				devVersion: "122",
+				devVersion: "125",
 				site:       "https://www.ilanzou.com",
 			},
 		}
@@ -72,7 +72,7 @@ func init() {
 				bucket:     "wpanstore",
 				unproved:   "ws",
 				proved:     "app",
-				devVersion: "121",
+				devVersion: "125",
 				site:       "https://www.feijipan.com",
 			},
 		}
diff --git a/drivers/ilanzou/util.go b/drivers/ilanzou/util.go
index 37e111ad53e..c9a30765b7f 100644
--- a/drivers/ilanzou/util.go
+++ b/drivers/ilanzou/util.go
@@ -59,8 +59,9 @@ func (d *ILanZou) request(pathname, method string, callback base.ReqCallback, pr
 		"extra": "2",
 	})
 	req.SetHeaders(map[string]string{
-		"Origin":  d.conf.site,
-		"Referer": d.conf.site + "/",
+		"Origin":     d.conf.site,
+		"Referer":    d.conf.site + "/",
+		"User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0",
 	})
 	if proved {
 		req.SetQueryParam("appToken", d.Token)