diff --git "a/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/1.Neo4J\347\256\200\344\273\213/config.json" "b/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/1.Neo4J\347\256\200\344\273\213/config.json"
new file mode 100644
index 0000000000000000000000000000000000000000..9b56882d5230e42168ac0e9e59df1fc61b9ca9c7
--- /dev/null
+++ "b/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/1.Neo4J\347\256\200\344\273\213/config.json"
@@ -0,0 +1,79 @@
+{
+  "node_id": "neo4j-0261ccb903994df281a2ec606b5d8c9e",
+  "keywords": [],
+  "children": [
+    {
+      "什么是图数据库": {
+        "keywords": [
+          "图数据库"
+        ],
+        "children": [
+          {
+            "图论": {
+              "keywords": [
+                "节点",
+                "边",
+                "关系"
+              ],
+              "children": [],
+              "keywords_must": [],
+              "keywords_forbid": [],
+              "node_id": "neo4j-3250e8d6f7fb417c83a8f007fc842a83"
+            }
+          },
+          {
+            "RDF": {
+              "keywords": [],
+              "children": [],
+              "keywords_must": [],
+              "keywords_forbid": [],
+              "node_id": "neo4j-80467f91b8454c029ac268ec80d934ec"
+            }
+          },
+          {
+            "属性图": {
+              "keywords": [],
+              "children": [],
+              "keywords_must": [],
+              "keywords_forbid": [],
+              "node_id": "neo4j-7e028f10298f4fd5ae055a8f05e375cb"
+            }
+          },
+          {
+            "原生图": {
+              "keywords": [],
+              "children": [],
+              "keywords_must": [],
+              "keywords_forbid": [],
+              "node_id": "neo4j-c462f5300d4740148067a2250766ef90"
+            }
+          }
+        ],
+        "keywords_must": [],
+        "keywords_forbid": [],
+        "node_id": "neo4j-013ee17e238c4c51b3988ba109d1fc3d"
+      },
+      "什么时候需要图数据库": {
+        "keywords": [
+          "图数据库"
+        ],
+        "children": [],
+        "keywords_must": [],
+        "keywords_forbid": []
+      },
+      "Neo4J图数据库概览": {
+        "keywords": [
+          "图数据库"
+        ],
+        "children": [],
+        "keywords_must": [],
+        "keywords_forbid": []
+      }
+    }
+  ],
+  "export": [
+    "helloworld.json"
+  ],
+  "keywords_must": [],
+  "keywords_forbid": []
+}
\ No newline at end of file
diff --git "a/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/2.\345\256\211\350\243\205\345\222\214\345\220\257\345\212\250/config.json" "b/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/2.\345\256\211\350\243\205\345\222\214\345\220\257\345\212\250/config.json"
new file mode 100644
index 0000000000000000000000000000000000000000..1e73f814946d79e44676bdf760a7deea185a300d
--- /dev/null
+++ "b/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/2.\345\256\211\350\243\205\345\222\214\345\220\257\345\212\250/config.json"
@@ -0,0 +1,8 @@
+{
+  "node_id": "neo4j-0ee8cb8ccd6f4a59bc20f9ccbf7d627e",
+  "keywords": [],
+  "children": [],
+  "export": [],
+  "keywords_must": [],
+  "keywords_forbid": []
+}
\ No newline at end of file
diff --git "a/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/config.json" "b/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/config.json"
new file mode 100644
index 0000000000000000000000000000000000000000..eff0813a4fe97dd243f6dfb54b928fccecbbdaca
--- /dev/null
+++ "b/data/1.Neo4J\345\210\235\351\230\266/1.\351\242\204\345\244\207\347\237\245\350\257\206/config.json"
@@ -0,0 +1,6 @@
+{
+  "node_id": "neo4j-a42252d5f8c24548bde127a385850a76",
+  "keywords": [],
+  "keywords_must": [],
+  "keywords_forbid": []
+}
\ No newline at end of file
diff --git "a/data/1.Neo4J\345\210\235\351\230\266/config.json" "b/data/1.Neo4J\345\210\235\351\230\266/config.json"
new file mode 100644
index 0000000000000000000000000000000000000000..249c185684f1469f98d61dbd3772cb8163eb4908
--- /dev/null
+++ "b/data/1.Neo4J\345\210\235\351\230\266/config.json"
@@ -0,0 +1,6 @@
+{
+  "node_id": "neo4j-5e171793d38e49e784f544a9f80d09cb",
+  "keywords": [],
+  "keywords_must": [],
+  "keywords_forbid": []
+}
\ No newline at end of file
diff --git "a/data/1.Neo4j \345\210\235\351\230\266/1.\345\233\276\346\225\260\346\215\256\345\272\223\345\237\272\346\234\254\346\246\202\345\277\265/1.\346\225\260\346\215\256\345\272\223\347\232\204\345\210\206\347\261\273\344\270\200\350\247\210/databases.json" "b/data/1.Neo4j \345\210\235\351\230\266/1.\345\233\276\346\225\260\346\215\256\345\272\223\345\237\272\346\234\254\346\246\202\345\277\265/1.\346\225\260\346\215\256\345\272\223\347\232\204\345\210\206\347\261\273\344\270\200\350\247\210/databases.json"
index de9a67e0ffb77ecac9df1e9816de521489c17d2a..03a71cc82a3522c9074a3e7d0f62c86babc59676 100644
--- "a/data/1.Neo4j \345\210\235\351\230\266/1.\345\233\276\346\225\260\346\215\256\345\272\223\345\237\272\346\234\254\346\246\202\345\277\265/1.\346\225\260\346\215\256\345\272\223\347\232\204\345\210\206\347\261\273\344\270\200\350\247\210/databases.json"	
+++ "b/data/1.Neo4j \345\210\235\351\230\266/1.\345\233\276\346\225\260\346\215\256\345\272\223\345\237\272\346\234\254\346\246\202\345\277\265/1.\346\225\260\346\215\256\345\272\223\347\232\204\345\210\206\347\261\273\344\270\200\350\247\210/databases.json"	
@@ -2,5 +2,6 @@
     "type": "code_options",
     "author": "shiny",
     "source": "databases.md",
-    "notebook_enable": false
+    "notebook_enable": false,
+    "exercise_id": "d22f8fb9ed0d4afebe55d5b62abb7808"
 }
\ No newline at end of file
diff --git "a/data/1.Neo4j \345\210\235\351\230\266/2.Neo4j \347\211\210\346\234\254\345\222\214\345\256\211\350\243\205/config.json" "b/data/1.Neo4j \345\210\235\351\230\266/2.Neo4j \347\211\210\346\234\254\345\222\214\345\256\211\350\243\205/config.json"
index b7332d826578f2ce005583f0998dca0ff2c7122d..0ca394cd7f93cfaf875e5a932ab24552dee93833 100644
--- "a/data/1.Neo4j \345\210\235\351\230\266/2.Neo4j \347\211\210\346\234\254\345\222\214\345\256\211\350\243\205/config.json"	
+++ "b/data/1.Neo4j \345\210\235\351\230\266/2.Neo4j \347\211\210\346\234\254\345\222\214\345\256\211\350\243\205/config.json"	
@@ -1,4 +1,6 @@
 {
   "node_id": "neo4j-9ec466f015f9422dab2b6b05f0581a8b",
-  "keywords": []
+  "keywords": [],
+  "keywords_must": [],
+  "keywords_forbid": []
 }
\ No newline at end of file
diff --git "a/data/2.Neo4J\344\270\255\351\230\266/config.json" "b/data/2.Neo4J\344\270\255\351\230\266/config.json"
new file mode 100644
index 0000000000000000000000000000000000000000..9afd70834052ffd92502277ac61d5f15da59fc22
--- /dev/null
+++ "b/data/2.Neo4J\344\270\255\351\230\266/config.json"
@@ -0,0 +1,6 @@
+{
+  "node_id": "neo4j-298b201de8044453a2d6e8d02e64962d",
+  "keywords": [],
+  "keywords_must": [],
+  "keywords_forbid": []
+}
\ No newline at end of file
diff --git "a/data/3.Neo4J\351\253\230\351\230\266/config.json" "b/data/3.Neo4J\351\253\230\351\230\266/config.json"
new file mode 100644
index 0000000000000000000000000000000000000000..23d1fc37663533144ea056bb273277cbd16a85df
--- /dev/null
+++ "b/data/3.Neo4J\351\253\230\351\230\266/config.json"
@@ -0,0 +1,6 @@
+{
+  "node_id": "neo4j-b05c040c3bfe49e29f17397e9e16c7d4",
+  "keywords": [],
+  "keywords_must": [],
+  "keywords_forbid": []
+}
\ No newline at end of file
diff --git a/data/config.json b/data/config.json
index 23f7316d938e73875d38a8fbbef859399be5ceb3..3af2366edc8015d05feff29844665259d2bbf312 100644
--- a/data/config.json
+++ b/data/config.json
@@ -1,5 +1,7 @@
 {
   "tree_name": "neo4j",
   "keywords": ["图数据库", "Neo4j", "图数据平台", "图机器学习", "图算法", "NoSQL", "Graph", "Graph Database", "Graph Data Science", "GDS"],
-  "node_id": "neo4j-50ecfa9d2d0f4012ae80a3656c0756ab"
+  "node_id": "neo4j-50ecfa9d2d0f4012ae80a3656c0756ab",
+  "keywords_must": [],
+  "keywords_forbid": []
 }
\ No newline at end of file
diff --git a/data/tree.json b/data/tree.json
index e7b59b01fc6684b1e3698efadad0108a03b8008c..ca6e952dada33e18c243bf790c14e1e608cb3fb6 100644
--- a/data/tree.json
+++ b/data/tree.json
@@ -17,43 +17,128 @@
                     "Neo4j简介": {
                       "node_id": "neo4j-0261ccb903994df281a2ec606b5d8c9e",
                       "keywords": [],
-                      "children": []
+                      "children": [
+                        {
+                          "什么是图数据库": {
+                            "keywords": [
+                              "图数据库"
+                            ],
+                            "children": [
+                              {
+                                "图论": {
+                                  "keywords": [
+                                    "节点",
+                                    "边",
+                                    "关系"
+                                  ],
+                                  "children": [],
+                                  "keywords_must": [],
+                                  "keywords_forbid": [],
+                                  "node_id": "neo4j-3250e8d6f7fb417c83a8f007fc842a83"
+                                }
+                              },
+                              {
+                                "RDF": {
+                                  "keywords": [],
+                                  "children": [],
+                                  "keywords_must": [],
+                                  "keywords_forbid": [],
+                                  "node_id": "neo4j-80467f91b8454c029ac268ec80d934ec"
+                                }
+                              },
+                              {
+                                "属性图": {
+                                  "keywords": [],
+                                  "children": [],
+                                  "keywords_must": [],
+                                  "keywords_forbid": [],
+                                  "node_id": "neo4j-7e028f10298f4fd5ae055a8f05e375cb"
+                                }
+                              },
+                              {
+                                "原生图": {
+                                  "keywords": [],
+                                  "children": [],
+                                  "keywords_must": [],
+                                  "keywords_forbid": [],
+                                  "node_id": "neo4j-c462f5300d4740148067a2250766ef90"
+                                }
+                              }
+                            ],
+                            "keywords_must": [],
+                            "keywords_forbid": [],
+                            "node_id": "neo4j-013ee17e238c4c51b3988ba109d1fc3d"
+                          },
+                          "什么时候需要图数据库": {
+                            "keywords": [
+                              "图数据库"
+                            ],
+                            "children": [],
+                            "keywords_must": [],
+                            "keywords_forbid": []
+                          },
+                          "Neo4J图数据库概览": {
+                            "keywords": [
+                              "图数据库"
+                            ],
+                            "children": [],
+                            "keywords_must": [],
+                            "keywords_forbid": []
+                          }
+                        }
+                      ],
+                      "keywords_must": [],
+                      "keywords_forbid": []
                     }
                   },
                   {
                     "安装和启动": {
                       "node_id": "neo4j-0ee8cb8ccd6f4a59bc20f9ccbf7d627e",
                       "keywords": [],
-                      "children": []
+                      "children": [],
+                      "keywords_must": [],
+                      "keywords_forbid": []
                     }
                   }
-                ]
+                ],
+                "keywords_must": [],
+                "keywords_forbid": []
               }
             },
             {
               "Cypher查询语言": {
                 "node_id": "neo4j-9ec466f015f9422dab2b6b05f0581a8b",
                 "keywords": [],
-                "children": []
+                "children": [],
+                "keywords_must": [],
+                "keywords_forbid": []
               }
             }
-          ]
+          ],
+          "keywords_must": [],
+          "keywords_forbid": []
         }
       },
       {
         "Neo4j中阶": {
           "node_id": "neo4j-298b201de8044453a2d6e8d02e64962d",
           "keywords": [],
-          "children": []
+          "children": [],
+          "keywords_must": [],
+          "keywords_forbid": []
         }
       },
       {
         "Neo4j高阶": {
           "node_id": "neo4j-b05c040c3bfe49e29f17397e9e16c7d4",
           "keywords": [],
-          "children": []
+          "children": [],
+          "keywords_must": [],
+          "keywords_forbid": []
         }
       }
-    ]
+    ],
+    "keywords_must": [],
+    "keywords_forbid": []
   }
 }
\ No newline at end of file
diff --git a/src/__pycache__/tree.cpython-38.pyc b/src/__pycache__/tree.cpython-38.pyc
index e6ddaf0acdad3e350135a78e16c129eec5f45305..8cd64f08030a69d2be732d675b6f5e909a1e15a3 100644
Binary files a/src/__pycache__/tree.cpython-38.pyc and b/src/__pycache__/tree.cpython-38.pyc differ
diff --git a/src/tree.py b/src/tree.py
index 95e1cbc5812810e30465eccc2632464caa5438e7..0c58d32b0da0e7099c2d2804fc97cdc35b240e28 100644
--- a/src/tree.py
+++ b/src/tree.py
@@ -1,10 +1,10 @@
-# -*- coding: utf-8 -*-
-import logging
-from genericpath import exists
 import json
+import logging
 import os
-import uuid
+import re
+import subprocess
 import sys
+import uuid
 import re
 
 id_set = set()
@@ -16,8 +16,29 @@ handler.setFormatter(formatter)
 logger.addHandler(handler)
 
 
+def search_author(author_dict, username):
+    for key in author_dict:
+        names = author_dict[key]
+        if username in names:
+            return key
+    return username
+
+
+def user_name(md_file, author_dict):
+    ret = subprocess.Popen([
+        "git", "log", md_file
+    ], stdout=subprocess.PIPE)
+    lines = list(map(lambda l: l.decode(), ret.stdout.readlines()))
+    author_lines = []
+    for line in lines:
+        if line.startswith('Author'):
+            author_lines.append(line.split(' ')[1])
+    author_nick_name = author_lines[-1]
+    return search_author(author_dict, author_nick_name)
+
+
 def load_json(p):
-    with open(p, 'r', encoding='utf-8') as f:
+    with open(p, 'r', encoding="utf-8") as f:
         return json.loads(f.read())
 
 
@@ -30,7 +51,7 @@ def dump_json(p, j, exist_ok=False, override=False):
             logger.error(f"{p} already exist")
             sys.exit(0)
 
-    with open(p, 'w+', encoding='utf-8') as f:
+    with open(p, 'w+', encoding="utf8") as f:
         f.write(json.dumps(j, indent=2, ensure_ascii=False))
 
 
@@ -72,7 +93,18 @@ def check_export(base, cfg):
 
 
 class TreeWalker:
-    def __init__(self, root, tree_name, title=None, log=None):
+    def __init__(
+            self, root,
+            tree_name,
+            title=None,
+            log=None,
+            authors=None,
+            enable_notebook=None,
+            ignore_keywords=False
+    ):
+        self.ignore_keywords = ignore_keywords
+        self.authors = authors if authors else {}
+        self.enable_notebook = enable_notebook
         self.name = tree_name
         self.root = root
         self.title = tree_name if title is None else title
@@ -84,7 +116,9 @@ class TreeWalker:
         root_node = {
             "node_id": root["node_id"],
             "keywords": root["keywords"],
-            "children": []
+            "children": [],
+            "keywords_must": root["keywords_must"],
+            "keywords_forbid": root["keywords_forbid"]
         }
         self.tree[root["tree_name"]] = root_node
         self.load_levels(root_node)
@@ -92,25 +126,31 @@ class TreeWalker:
         for index, level in enumerate(root_node["children"]):
             level_title = list(level.keys())[0]
             level_node = list(level.values())[0]
-            level_path = os.path.join(self.root, f"{index+1}.{level_title}")
+            level_path = os.path.join(self.root, f"{index + 1}.{level_title}")
             self.load_chapters(level_path, level_node)
             for index, chapter in enumerate(level_node["children"]):
                 chapter_title = list(chapter.keys())[0]
                 chapter_node = list(chapter.values())[0]
                 chapter_path = os.path.join(
-                    level_path, f"{index+1}.{chapter_title}")
+                    level_path, f"{index + 1}.{chapter_title}")
                 self.load_sections(chapter_path, chapter_node)
                 for index, section_node in enumerate(chapter_node["children"]):
                     section_title = list(section_node.keys())[0]
                     full_path = os.path.join(
-                        chapter_path, f"{index}.{section_title}")
+                        chapter_path, f"{index + 1}.{section_title}")
                     if os.path.isdir(full_path):
+                        self.check_section_keywords(full_path)
                         self.ensure_exercises(full_path)
 
         tree_path = os.path.join(self.root, "tree.json")
         dump_json(tree_path, self.tree, exist_ok=True, override=True)
         return self.tree
 
+    def sort_dir_list(self, dirs):
+        result = [self.extract_node_env(dir) for dir in dirs]
+        result.sort(key=lambda item: item[0])
+        return result
+
     def load_levels(self, root_node):
         levels = []
         for level in os.listdir(self.root):
@@ -133,6 +173,8 @@ class TreeWalker:
                 "node_id": config["node_id"],
                 "keywords": config["keywords"],
                 "children": [],
+                "keywords_must": config["keywords_must"],
+                "keywords_forbid": config["keywords_forbid"]
             }
         }
 
@@ -167,7 +209,7 @@ class TreeWalker:
         for index, [number, element] in enumerate(children):
             title = list(element.keys())[0]
             origin = os.path.join(base, f"{number}.{title}")
-            posted = os.path.join(base, f"{index+1}.{title}")
+            posted = os.path.join(base, f"{index + 1}.{title}")
             if origin != posted:
                 self.logger.info(f"rename [{origin}] to [{posted}]")
             os.rename(origin, posted)
@@ -184,6 +226,8 @@ class TreeWalker:
                 "tree_name": self.name,
                 "keywords": [],
                 "node_id": self.gen_node_id(),
+                "keywords_must": [],
+                "keywords_forbid": []
             }
             dump_json(config_path, config, exist_ok=True, override=True)
         else:
@@ -213,7 +257,9 @@ class TreeWalker:
         if not os.path.exists(config_path):
             config = {
                 "node_id": self.gen_node_id(),
-                "keywords": []
+                "keywords": [],
+                "keywords_must": [],
+                "keywords_forbid": []
             }
             dump_json(config_path, config, exist_ok=True, override=True)
         else:
@@ -237,15 +283,25 @@ class TreeWalker:
             config = load_json(config_path)
             flag, result = self.ensure_node_id(config)
             if flag:
-                dump_json(config_path, config, exist_ok=True, override=True)
+                dump_json(config_path, result, exist_ok=True, override=True)
         return config
 
     def ensure_node_id(self, config):
-        if "node_id" not in config:
-            config["node_id"] = self.gen_node_id()
-            return True, config
-        else:
-            return False, config
+        flag = False
+        if "node_id" not in config or \
+                not config["node_id"].startswith(f"{self.name}-") or \
+                config["node_id"] in id_set:
+            new_id = self.gen_node_id()
+            id_set.add(new_id)
+            config["node_id"] = new_id
+            flag = True
+
+        for child in config.get("children", []):
+            child_node = list(child.values())[0]
+            f, _ = self.ensure_node_id(child_node)
+            flag = flag or f
+
+        return flag, config
 
     def gen_node_id(self):
         return f"{self.name}-{uuid.uuid4().hex}"
@@ -258,7 +314,8 @@ class TreeWalker:
             return int(number), title
         except Exception as error:
             self.logger.error(f"目录 [{path}] 解析失败，结构不合法，可能是缺少序号")
-            sys.exit(1)
+            # sys.exit(1)
+            raise error
 
     def load_chapter_node(self, full_name):
         config = self.ensure_chapter_config(full_name)
@@ -268,6 +325,8 @@ class TreeWalker:
                 "node_id": config["node_id"],
                 "keywords": config["keywords"],
                 "children": [],
+                "keywords_must": config["keywords_must"],
+                "keywords_forbid": config["keywords_forbid"]
             }
         }
         return num, result
@@ -279,7 +338,9 @@ class TreeWalker:
             name: {
                 "node_id": config["node_id"],
                 "keywords": config["keywords"],
-                "children": config.get("children", [])
+                "children": config.get("children", []),
+                "keywords_must": config["keywords_must"],
+                "keywords_forbid": config["keywords_forbid"]
             }
         }
         # if "children" in config:
@@ -288,9 +349,77 @@ class TreeWalker:
 
     def ensure_exercises(self, section_path):
         config = self.ensure_section_config(section_path)
+        flag = False
+        for e in os.listdir(section_path):
+            base, ext = os.path.splitext(e)
+            _, source = os.path.split(e)
+            if ext != ".md":
+                continue
+            mfile = base + ".json"
+            meta_path = os.path.join(section_path, mfile)
+            md_file = os.path.join(section_path, e)
+            self.ensure_exercises_meta(meta_path, source, md_file)
+            export = config.get("export", [])
+            if mfile not in export and self.name != "algorithm":
+                export.append(mfile)
+                flag = True
+                config["export"] = export
+
+        if flag:
+            dump_json(os.path.join(section_path, "config.json"),
+                      config, True, True)
+
         for e in config.get("export", []):
             full_name = os.path.join(section_path, e)
             exercise = load_json(full_name)
-            if "exercise_id" not in exercise:
-                exercise["exercise_id"] = uuid.uuid4().hex
-                dump_json(full_name, exercise)
+            if "exercise_id" not in exercise or exercise.get("exercise_id") in id_set:
+                eid = uuid.uuid4().hex
+                exercise["exercise_id"] = eid
+                dump_json(full_name, exercise, True, True)
+            else:
+                id_set.add(exercise["exercise_id"])
+
+    def ensure_exercises_meta(self, meta_path, source, md_file):
+        _, mfile = os.path.split(meta_path)
+        meta = None
+        if os.path.exists(meta_path):
+            with open(meta_path) as f:
+                content = f.read()
+            if content:
+                meta = json.loads(content)
+                if "exercise_id" not in meta:
+                    meta["exercise_id"] = uuid.uuid4().hex
+                if "notebook_enable" not in meta:
+                    meta["notebook_enable"] = self.default_notebook()
+                if "source" not in meta:
+                    meta["source"] = source
+                if "author" not in meta:
+                    meta["author"] = user_name(md_file, self.authors)
+                if "type" not in meta:
+                    meta["type"] = "code_options"
+
+        if meta is None:
+            meta = {
+                "type": "code_options",
+                "author": user_name(md_file, self.authors),
+                "source": source,
+                "notebook_enable": self.default_notebook(),
+                "exercise_id": uuid.uuid4().hex
+            }
+        dump_json(meta_path, meta, True, True)
+
+    def default_notebook(self):
+        if self.enable_notebook is not None:
+            return self.enable_notebook
+        if self.name in ["python", "java", "c"]:
+            return True
+        else:
+            return False
+
+    def check_section_keywords(self, full_path):
+        if self.ignore_keywords:
+            return
+        config = self.ensure_section_config(full_path)
+        if not config.get("keywords", []):
+            self.logger.error(f"节点 [{full_path}] 的关键字为空，请修改配置文件写入关键字")
+            sys.exit(1)