diff --git a/packages/dbgpt-core/src/dbgpt/agent/expand/actions/chart_action.py b/packages/dbgpt-core/src/dbgpt/agent/expand/actions/chart_action.py
index 6af1092f5..c3b50b916 100644
--- a/packages/dbgpt-core/src/dbgpt/agent/expand/actions/chart_action.py
+++ b/packages/dbgpt-core/src/dbgpt/agent/expand/actions/chart_action.py
@@ -87,10 +87,18 @@ class ChartAction(Action[SqlInput]):
 
             param_dict = model_to_dict(param)
             if not data_df.empty:
+                param_dict["count"] = len(data_df)
+
                 param_dict["data"] = json.loads(
-                    data_df.to_json(orient="records", date_format="iso", date_unit="s")
+                    data_df.to_json(
+                        orient="records",
+                        force_ascii=False,
+                        date_format="iso",
+                        date_unit="s",
+                    )
                 )
-            content = json.dumps(param_dict)
+
+            content = json.dumps(param_dict, ensure_ascii=False)
 
             return ActionOutput(
                 is_exe_success=True,