diff --git a/app/pages/LLMBot/chat.tsx b/app/pages/LLMBot/chat.tsx
index 614e434e..f11a0e94 100644
--- a/app/pages/LLMBot/chat.tsx
+++ b/app/pages/LLMBot/chat.tsx
@@ -78,7 +78,6 @@ function Chat() {
         temperature: 1,
         top_p: 0.95,
         top_k: 40,
-        max_tokens: -1,
         repeat_penalty: 1.1,
         messages: sendMessages,
       },
diff --git a/app/stores/llm.ts b/app/stores/llm.ts
index 91aae60a..4c550242 100644
--- a/app/stores/llm.ts
+++ b/app/stores/llm.ts
@@ -267,8 +267,9 @@ class LLM {
         const url = (res.message.choices[0].message?.content as string)?.split('\n')[0];
         const paths = url
           .toLowerCase()
-          .replaceAll(/\s|"|\\/g, '')
-          .split(',');
+          .replaceAll('，', ',') // chinese comma
+          .split(',')
+          .map((path) => path.replaceAll(/\s|"|\\/g, ''));
         console.log('select doc url:', paths);
         if (paths[0] !== 'sorry') {
           let doc = ngqlDoc.ngqlMap[paths[0]]?.content;
@@ -278,7 +279,9 @@ class LLM {
           const doc2 = ngqlDoc.ngqlMap[paths[1]]?.content;
           if (doc2) {
             doc =
-              doc.slice(0, this.config.maxContextLength / 2) + `\n` + doc2.slice(0, this.config.maxContextLength / 2);
+              doc.slice(0, (this.config.maxContextLength * 2) / 3) +
+              `\n` +
+              doc2.slice(0, this.config.maxContextLength / 2);
           }
           doc = doc.replaceAll(/\n\n+/g, '');
           if (doc.length) {
diff --git a/package.json b/package.json
index 037cfda8..f1ac516d 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "@vesoft-inc/force-graph": "2.0.7",
     "@vesoft-inc/i18n": "^1.0.1",
     "@vesoft-inc/icons": "^1.2.0",
-    "@vesoft-inc/nebula-explain-graph": "^1.0.2-beta.6",
+    "@vesoft-inc/nebula-explain-graph": "^1.0.3",
     "@vesoft-inc/veditor": "^4.4.12",
     "antd": "^5.8.4",
     "axios": "^0.23.0",