diff --git a/dsLightRag/static/ai.html b/dsLightRag/static/ai.html
index ebca60ed..073a631f 100644
--- a/dsLightRag/static/ai.html
+++ b/dsLightRag/static/ai.html
@@ -213,7 +213,7 @@
         <h3>知识库范围</h3>
         <div class="doc-checkboxes">
             <label>
-                <input type="radio" name="topic" value="SuShi">
+                <input type="radio" name="topic" value="SuShi" checked>
                 苏轼知识
             </label>
             <label>