diff --git a/relay/adaptor/xunfei/main.go b/relay/adaptor/xunfei/main.go
index e9765a25..99c4d1f4 100644
--- a/relay/adaptor/xunfei/main.go
+++ b/relay/adaptor/xunfei/main.go
@@ -272,9 +272,9 @@ func xunfeiMakeRequest(textRequest model.GeneralOpenAIRequest, domain, authUrl,
 }
 
 func parseAPIVersionByModelName(modelName string) string {
-	parts := strings.Split(modelName, "-")
-	if len(parts) == 2 {
-		return parts[1]
+	index := strings.IndexAny(modelName, "-")
+	if index != -1 {
+		return modelName[index+1:]
 	}
 	return ""
 }