diff --git "a/data/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\210\235\351\230\266/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\205\245\351\227\250/1.HelloWorld/helloworld.json" "b/data/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\210\235\351\230\266/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\205\245\351\227\250/1.HelloWorld/helloworld.json"
index f6393b0f4e11911eabd0b87b70c2d5b2bc315d6e..00b91eebbe8d2e1e0c1e5a27131b417447ddc3c5 100644
--- "a/data/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\210\235\351\230\266/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\205\245\351\227\250/1.HelloWorld/helloworld.json"
+++ "b/data/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\210\235\351\230\266/1.\346\220\234\347\264\242\345\205\245\351\227\250\345\205\245\351\227\250/1.HelloWorld/helloworld.json"
@@ -1,6 +1,6 @@
 {
   "type": "code_options",
-  "author": null,
+  "author": "feilong",
   "source": "helloworld.md",
   "notebook_enable": false,
   "exercise_id": "69e098cf14414bc69b8a44a4fb347b65"
diff --git a/data/tree.json b/data/tree.json
index cbd710ea0f63d3e80d856b22ed5ec0ca0d9e30e6..5e1bb6c3f29ec721d83fb39f38cc26a242eb2b8b 100644
--- a/data/tree.json
+++ b/data/tree.json
@@ -16,20 +16,25 @@
                   {
                     "HelloWorld": {
                       "node_id": "search-8020fd0a454e42d0879b1b0bbdeafe8b",
-                      "keywords": [],
+                      "keywords": [
+                        "search engine"
+                      ],
                       "children": [],
                       "keywords_must": [],
-                      "keywords_forbid": []
+                      "keywords_forbid": [],
+                      "group": 0
                     }
                   }
                 ],
                 "keywords_must": [],
-                "keywords_forbid": []
+                "keywords_forbid": [],
+                "group": 0
               }
             }
           ],
           "keywords_must": [],
-          "keywords_forbid": []
+          "keywords_forbid": [],
+          "group": 0
         }
       },
       {
@@ -38,7 +43,8 @@
           "keywords": [],
           "children": [],
           "keywords_must": [],
-          "keywords_forbid": []
+          "keywords_forbid": [],
+          "group": 0
         }
       },
       {
@@ -47,11 +53,13 @@
           "keywords": [],
           "children": [],
           "keywords_must": [],
-          "keywords_forbid": []
+          "keywords_forbid": [],
+          "group": 0
         }
       }
     ],
     "keywords_must": [],
-    "keywords_forbid": []
+    "keywords_forbid": [],
+    "group": 0
   }
 }
\ No newline at end of file