diff --git a/Developer Guide-en.md b/Developer Guide-en.md
index 2c3f55e..261d21b 100644
--- a/Developer Guide-en.md	
+++ b/Developer Guide-en.md	
@@ -14,7 +14,7 @@ Note:
 
   - EventParser (Access to the source data, simulating slave protocol to interact with master, protocol analysis)
   - EventSink (EventParser and EventStore Linker for data filtering, processing and dispatch)
-    Events (Data storage)
+  - EventStore (Data storage)
   - MetaManager (Incremental Subscription & consumption meta-info Manager)