diff --git a/zh-cn/device-dev/porting/standard-system-porting-guide.md b/zh-cn/device-dev/porting/standard-system-porting-guide.md
index 8775077331ce66007f78d93e73805810af651f52..43b277cd1deac0e828fde5e09bddfdf87b5ce98d 100644
--- a/zh-cn/device-dev/porting/standard-system-porting-guide.md
+++ b/zh-cn/device-dev/porting/standard-system-porting-guide.md
@@ -208,12 +208,12 @@ root {
     ...
     display :: host {
         device_lcd :: device {
-                deviceN :: deviceNode {
-                    policy = 0;
-                    priority = 100;
-                    preload = 2;
-                    moduleName = "LCD_XXXX";
-                }
+            deviceN :: deviceNode {
+                policy = 0;
+                priority = 100;
+                preload = 2;
+                moduleName = "LCD_XXXX";
+            }
         }
     }
 }