diff --git a/pkg/rule_engine/instance.go b/pkg/rule_engine/instance.go
index 304b2fe..5fbfd36 100644
--- a/pkg/rule_engine/instance.go
+++ b/pkg/rule_engine/instance.go
@@ -3,7 +3,7 @@ package rule_engine
 import (
 	"pandax/pkg/rule_engine/manifest"
 	"pandax/pkg/rule_engine/nodes"
-
+    "fmt"
 	"github.com/sirupsen/logrus"
 )