diff --git a/2016.json b/2016.json
index ba229ab..0073de8 100644
Binary files a/2016.json and b/2016.json differ
diff --git a/fetch_holidays.py b/fetch_holidays.py
index 5739c9b..7e9095f 100755
--- a/fetch_holidays.py
+++ b/fetch_holidays.py
@@ -5,7 +5,7 @@ import argparse
 import json
 import re
 from datetime import date, timedelta
-from typing import List, Optional
+from typing import Iterator, List, Optional, Tuple
 
 import bs4
 import requests
@@ -30,26 +30,46 @@ def get_paper_urls(year: int) -> List[str]:
     body = requests.get(url).text
     ret = re.findall(
         r'<li class="res-list".*?<a href="(.+?)".*?</li>', body, flags=re.S)
-    assert all(
-        re.match(
-            r'http://www.gov.cn/zhengce/content/\d{4}-\d{2}/\d{2}/content_\d+.htm', i)
-        for i in ret), 'Site changed, need human verify'
 
     return ret
 
 
-def get_paper(url):
+def get_paper(url: str) -> str:
+    """Extract paper text from url.
+
+    Args:
+        url (str): Paper url.
+
+    Returns:
+        str: Extracted paper text.
+    """
+
+    assert re.match(r'http://www.gov.cn/zhengce/content/\d{4}-\d{2}/\d{2}/content_\d+.htm',
+                    url), 'Site changed, need human verify'
+
     response = requests.get(url)
     response.encoding = 'utf-8'
     soup = bs4.BeautifulSoup(response.text, features='html.parser')
     container = soup.find('td', class_='b12c')
     assert container, f'Can not get paper container from url: {url}'
-    ret = container.get_text().replace('\u3000', '\n')
+    ret = container.get_text().replace('\u3000\u3000', '\n')
     assert ret, f'Can not get paper context from url: {url}'
     return ret
 
 
-def get_rules(paper: str):
+def get_rules(paper: str) -> Iterator[Tuple[str, str]]:
+    """Extract rules from paper.
+
+    Args:
+        paper (str): Paper text
+
+    Raises:
+        NotImplementedError: When find no rules.
+
+    Returns:
+        Iterator[Tuple[str, str]]: (name, description)
+    """
+
     lines: list = paper.splitlines()
     count = 0
     for i in sorted(set(lines), key=lines.index):
@@ -74,11 +94,27 @@ class SentenceParser:
         self.year = year
         self._date_memory = set()
 
-    def extract_dates(self, value) -> List[date]:
+    def extract_dates(self, text: str) -> Iterator[date]:
+        """Extract date from text.
+
+        Args:
+            text (str): Text to extract
+
+        Returns:
+            Iterator[date]: Extracted dates.
+        """
+
+        count = 0
         for method in self.date_extraction_methods:
-            for i in method(self, value):
-                if i not in self._date_memory:
-                    yield i
+            for i in method(self, text):
+                count += 1
+                if i in self._date_memory:
+                    continue
+                self._date_memory.add(i)
+                yield i
+
+        if not count:
+            raise NotImplementedError(text)
 
     def get_date(self, year: Optional[int], month: int, day: int) -> date:
         """Get date in context.
@@ -147,12 +183,19 @@ class SentenceParser:
         _extract_dates_3
     ]
 
-    def parse(self, memory):
+    def parse(self, memory: set) -> Iterator[dict]:
+        """Parse days with memory
+
+        Args:
+            memory (set): Date memory
+
+        Returns:
+            Iterator[dict]: Days without name field.
+        """
+
         self._date_memory = memory
         for method in self.parsing_methods:
             for i in method(self):
-                if i['date'] in self._date_memory:
-                    continue
                 yield i
 
     def _parse_rest_1(self):
@@ -201,7 +244,7 @@ class DescriptionParser:
         self.description = description
         self._date_memory = set()
 
-    def parse(self, year: int):
+    def parse(self, year: int) -> Iterator[dict]:
         """Generator for description parsing result.
 
         Args:
@@ -211,7 +254,6 @@ class DescriptionParser:
         self._date_memory.clear()
         for i in re.split('，|。', self.description):
             for j in SentenceParser(i, year).parse(self._date_memory):
-                self._date_memory.add(j['date'])
                 yield j
 
         if not self._date_memory:
diff --git a/requirements.txt b/requirements.txt
index 792285a..4f0073b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 requests ~= 2.21.0
-beautifulsoup4 ~= 4.7.1
\ No newline at end of file
+beautifulsoup4 ~= 4.7.1
+tqdm ~= 4.30.0
diff --git a/test_fetch_holidays.py b/test_fetch_holidays.py
index f8a1e57..b261971 100644
--- a/test_fetch_holidays.py
+++ b/test_fetch_holidays.py
@@ -1,4 +1,4 @@
-
+"""Test module `fetch_holidays`.  """
 import json
 import sys
 
@@ -6,7 +6,8 @@ from fetch_holidays import CustomJSONEncoder, DescriptionParser
 
 
 def _normalize(iterable):
-    return sorted(json.loads(json.dumps(list(iterable), cls=CustomJSONEncoder)), key=lambda x: x['date'])
+    return sorted(json.loads(json.dumps(list(iterable), cls=CustomJSONEncoder)),
+                  key=lambda x: x['date'])
 
 
 def _generate_tests():
diff --git a/update.py b/update.py
index 1106ddd..d9173ce 100755
--- a/update.py
+++ b/update.py
@@ -1,9 +1,14 @@
 #!/usr/bin/env python3
+"""Script for updating data. """
+
+import argparse
 import json
 import os
 import subprocess
 from datetime import datetime, timedelta, tzinfo
 
+from tqdm import tqdm
+
 from fetch_holidays import CustomJSONEncoder, fetch_holiday
 
 
@@ -28,7 +33,16 @@ def _file_path(*other):
     return os.path.join(__dirname__, *other)
 
 
-def update_data(year):
+def update_data(year: int) -> str:
+    """Update and store data for a year.
+
+    Args:
+        year (int): Year
+
+    Returns:
+        str: Stored data path
+    """
+
     filename = _file_path(f'{year}.json')
     with open(filename, 'w', encoding='utf-8', newline='\n') as f:
         json.dump(fetch_holiday(year), f,
@@ -39,11 +53,18 @@ def update_data(year):
 
 
 def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--all', action='store_true')
+    args = parser.parse_args()
+
     now = datetime.now(ChinaTimezone())
 
     filenames = []
-    filenames.append(update_data(now.year))
-    filenames.append(update_data(now.year + 1))
+    progress = tqdm(range(2014 if args.all else now.year, now.year + 2))
+    for i in progress:
+        progress.set_description(f'Updating {i} data')
+        filename = update_data(i)
+        filenames.append(filename)
 
     subprocess.run(['git', 'add', *filenames], check=True)
     diff = subprocess.run(['git', 'diff', '--stat', '--cached'],