diff --git a/docs/en/04-concept/index.md b/docs/en/04-concept/index.md
index 28548da8f9caccc3a9f241d8131b890087636e3c..efb9f1079b3cc1e04053becc3608aac9bc5643a2 100644
--- a/docs/en/04-concept/index.md
+++ b/docs/en/04-concept/index.md
@@ -158,7 +158,7 @@ Queries can be executed on both a table (subtable) and a STable. For a query on
 
 In TDengine, it is recommended to use a subtable instead of a regular table for a DCP. In the meters example, we can create subtables like d1001, d1002, d1003, and d1004 under super table meters.
 
-To better understand the data model using super table and subtable, please refer to ![Meters Data Model Diagram](./supertable.webp)
+To better understand the data model using super table and subtable, please refer to the diagram below which demonstrates the data model of meters example. ![Meters Data Model Diagram](./supertable.webp)
 
 ## Database