diff --git a/src/release/demo.py b/src/release/demo.py
index d62388a..92add75 100644
--- a/src/release/demo.py
+++ b/src/release/demo.py
@@ -2,22 +2,15 @@
 # -*- coding: utf-8 -*-
 
 from utils import loadBook
-from utils import saveFile
 from utils import txtRelease
 from utils import jsonRelease
 from utils import htmlRelease
-from utils import releaseInfo
+from utils import gitbookRelease
 
-metadata, content = loadBook('rc-5')
-
-saveFile(
-    releaseInfo['txt'], txtRelease(metadata, content)
-)
 
-saveFile(
-    releaseInfo['json'], jsonRelease(metadata, content)
-)
+metadata, content = loadBook('rc-5')
 
-saveFile(
-    releaseInfo['calibre'], htmlRelease(metadata, content)
-)
+txtRelease(metadata, content)
+jsonRelease(metadata, content)
+htmlRelease(metadata, content)
+gitbookRelease(metadata, content)
diff --git a/src/release/gitbook.py b/src/release/gitbook.py
deleted file mode 100755
index c0d6dd8..0000000
--- a/src/release/gitbook.py
+++ /dev/null
@@ -1,87 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-import os
-import re
-import sys
-import shutil
-from common import loadData
-from common import rootPath
-from common import saveFile
-from common import releaseInfo
-from common import createFolder
-
-
-def initFolder() -> None:
-    createFolder(releaseInfo['gitbookDir'])
-    createFolder(os.path.join(releaseInfo['gitbookDir'], './assets/'))
-    createFolder(os.path.join(releaseInfo['gitbookDir'], './content/'))
-
-
-def markdownTransfer(content: str) -> str:
-    symbols = [
-        '\\', '`', '*', '_', '~',
-        '{', '}', '[', ']', '(', ')',
-        '#', '+', '-', '.', '!', '|',
-    ]
-    for symbol in symbols:
-        content = content.replace(symbol, '\\' + symbol)  # add `\` before symbol
-    return '  ' + content
-
-
-def loadChapter(caption: str, content: list) -> str:
-    chapterNum = re.search(r'^第(\d+)章', caption)[1]
-    chapterNum = '0' * (3 - len(chapterNum)) + chapterNum  # add `0` prefix
-    fileName = 'chapter-%s.md' % chapterNum
-    content = [markdownTransfer(x) for x in content]
-    saveFile(
-        os.path.join(releaseInfo['gitbookDir'], './content/', fileName),
-        '# %s\n\n%s\n' % (caption, '\n\n'.join(content))
-    )
-    return fileName
-
-
-def loadChapters(chapters: dict) -> dict:
-    catalog = {}
-    for (title, chapter) in chapters.items():
-        catalog[title] = loadChapter(title, chapter)
-    return catalog
-
-
-def loadCover(metadata: dict) -> None:
-    resDownload = {
-        'TXT 下载': 'https://res.343.re/Share/XXRS/%E6%A0%A9%E6%A0%A9%E8%8B%A5%E7%94%9F.txt',
-        'MOBI 下载': 'https://res.343.re/Share/XXRS/%E6%A0%A9%E6%A0%A9%E8%8B%A5%E7%94%9F.mobi',
-    }
-    cover = '---\ndescription: 作者：%s\n---\n\n# %s\n\n' % (metadata['author'], metadata['name'])
-    cover += '<figure><img src="assets/cover.jpg" alt=""><figcaption><p>栩栩若生</p></figcaption></figure>\n\n'
-    cover += '\n>\n'.join(['> %s' % x for x in metadata['desc']]) + '\n\n'
-    for (resName, resUrl) in resDownload.items():
-        cover += '{%% hint style="success" %%}\n### >>> [%s](%s) <<<\n{%% endhint %%}\n\n' % (resName, resUrl)
-    cover += '{% embed url="https://github.com/dnomd343/xxrs-crawler" %}\n项目地址\n{% endembed %}\n'
-    saveFile(os.path.join(releaseInfo['gitbookDir'], 'README.md'), cover)
-
-
-def loadSummary(catalog: dict) -> None:
-    summary = '# XXRS\n\n'
-    summary += '* [序言](README.md)\n\n'
-    summary += '## 内容 <a href="#content" id="content"></a>\n\n'
-    for (title, mdFile) in catalog.items():
-        summary += '* [%s](content/%s)\n' % (title, mdFile)
-    saveFile(os.path.join(releaseInfo['gitbookDir'], 'SUMMARY.md'), summary)
-
-
-def loadGitbook(jsonName: str) -> None:
-    data = loadData(jsonName)
-    loadCover(data['metadata'])
-    catalog = loadChapters(data['content'])
-    loadSummary(catalog)
-    shutil.copy(
-        os.path.join(rootPath, './assets/cover.jpg'),
-        os.path.join(releaseInfo['gitbookDir'], './assets/cover.jpg')
-    )
-
-
-if __name__ == '__main__':
-    initFolder()
-    loadGitbook(sys.argv[1])
diff --git a/src/release/utils/__init__.py b/src/release/utils/__init__.py
index c3016ba..a379427 100644
--- a/src/release/utils/__init__.py
+++ b/src/release/utils/__init__.py
@@ -2,9 +2,8 @@
 # -*- coding: utf-8 -*-
 
 from .common import loadBook
-from .common import saveFile
-from .common import releaseInfo
 
-from .sequence import txtRelease
-from .sequence import jsonRelease
-from .sequence import htmlRelease
+from .release import txtRelease
+from .release import jsonRelease
+from .release import htmlRelease
+from .release import gitbookRelease
diff --git a/src/release/utils/common.py b/src/release/utils/common.py
index a8aafbe..e122f1b 100644
--- a/src/release/utils/common.py
+++ b/src/release/utils/common.py
@@ -4,6 +4,8 @@
 import os
 import json
 
+projectUrl = 'https://github.com/dnomd343/xxrs-crawler'
+
 rootPath = os.path.join(  # project root directory
     os.path.dirname(os.path.realpath(__file__)), '../../../'
 )
@@ -24,6 +26,19 @@ releaseInfo = {  # convert to absolute path
     key: os.path.join(releasePath, file) for (key, file) in releaseInfo.items()
 }
 
+resourceInfo = {  # resource download links
+    'TXT 下载': [
+        'https://res.343.re/Share/XXRS/%E6%A0%A9%E6%A0%A9%E8%8B%A5%E7%94%9F.txt',
+        'https://cdn.dnomd343.top/xxrs/%E6%A0%A9%E6%A0%A9%E8%8B%A5%E7%94%9F.txt',
+        'https://github.com/dnomd343/xxrs-crawler/releases/latest/download/XXRS.txt',
+    ],
+    'MOBI 下载': [
+        'https://res.343.re/Share/XXRS/%E6%A0%A9%E6%A0%A9%E8%8B%A5%E7%94%9F.mobi',
+        'https://cdn.dnomd343.top/xxrs/%E6%A0%A9%E6%A0%A9%E8%8B%A5%E7%94%9F.mobi',
+        'https://github.com/dnomd343/xxrs-crawler/releases/latest/download/XXRS.mobi',
+    ],
+}
+
 
 def createFolder(folderName: str) -> None:  # create folder
     if not os.path.exists(folderName):
diff --git a/src/release/utils/release.py b/src/release/utils/release.py
new file mode 100644
index 0000000..6c58e2a
--- /dev/null
+++ b/src/release/utils/release.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import shutil
+
+from .common import rootPath
+from .common import saveFile
+from .common import projectUrl
+from .common import releaseInfo
+from .common import createFolder
+from .common import resourceInfo
+
+from .sequence import txtSerialize
+from .sequence import jsonSerialize
+from .sequence import htmlSerialize
+
+from .sequence import gitbookSummary
+from .sequence import gitbookChapters
+from .sequence import gitbookMetadata
+
+
+def txtRelease(metadata: dict, content: dict) -> None:
+    saveFile(
+        releaseInfo['txt'], txtSerialize(metadata, content)
+    )
+
+
+def jsonRelease(metadata: dict, content: dict) -> None:
+    saveFile(
+        releaseInfo['json'], jsonSerialize(metadata, content)
+    )
+
+
+def htmlRelease(metadata: dict, content: dict) -> None:
+    saveFile(
+        releaseInfo['calibre'], htmlSerialize(metadata, content)
+    )
+
+
+def gitbookRelease(metadata: dict, content: dict) -> None:
+    createFolder(releaseInfo['gitbook'])
+    createFolder(os.path.join(releaseInfo['gitbook'], './assets/'))
+    createFolder(os.path.join(releaseInfo['gitbook'], './content/'))
+
+    cover = gitbookMetadata(metadata)
+    for (resName, resUrls) in resourceInfo.items():
+        cover += '{% hint style="success" %}\n' \
+            + '### >>> [%s](%s) <<<\n' % (resName, resUrls[0]) \
+            + '{% endhint %}\n\n'
+    cover += '{%% embed url="%s" %%}\n项目地址\n{%% endembed %%}\n' % projectUrl
+
+    saveFile(
+        os.path.join(releaseInfo['gitbook'], 'README.md'), cover
+    )
+    saveFile(
+        os.path.join(releaseInfo['gitbook'], 'SUMMARY.md'), gitbookSummary(content)
+    )
+    for (chapterPath, chapterContent) in gitbookChapters(content).items():
+        saveFile(
+            os.path.join(releaseInfo['gitbook'], chapterPath), chapterContent
+        )
+    shutil.copy(  # gitbook cover
+        os.path.join(rootPath, './assets/cover.jpg'),
+        os.path.join(releaseInfo['gitbook'], './assets/cover.jpg')
+    )
diff --git a/src/release/utils/sequence.py b/src/release/utils/sequence.py
index 087ddea..ba9bddc 100644
--- a/src/release/utils/sequence.py
+++ b/src/release/utils/sequence.py
@@ -1,10 +1,24 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+import os
+import re
 import json
 
+MarkdownSymbols = [
+    '\\', '`', '*', '_', '~',
+    '{', '}', '[', ']', '(', ')',
+    '#', '+', '-', '.', '!', '|',
+]
 
-def jsonRelease(metadata: dict, content: dict) -> str:
+
+def markdownTransfer(content: str) -> str:
+    for symbol in MarkdownSymbols:
+        content = content.replace(symbol, '\\' + symbol)  # add `\` before symbol
+    return '&emsp;&emsp;' + content  # add chinese indentation
+
+
+def jsonSerialize(metadata: dict, content: dict) -> str:
     return json.dumps({
         'metadata': metadata,
         'content': content,
@@ -19,7 +33,7 @@ def txtMetadata(metadata: dict) -> str:  # txt metadata
     )
 
 
-def txtRelease(metadata: dict, content: dict) -> str:
+def txtSerialize(metadata: dict, content: dict) -> str:
     result = [txtMetadata(metadata)]
     for (title, chapter) in content.items():
         result.append('\n\n'.join([title] + chapter))  # combine txt content
@@ -32,7 +46,7 @@ def htmlMetadata(metadata: dict) -> str:  # html metadata
     )
 
 
-def htmlRelease(metadata: dict, content: dict) -> str:
+def htmlSerialize(metadata: dict, content: dict) -> str:
     result = [htmlMetadata(metadata)]
     for (title, chapter) in content.items():
         result.append(
@@ -41,3 +55,36 @@ def htmlRelease(metadata: dict, content: dict) -> str:
             )
         )
     return '\n\n'.join(result) + '\n'
+
+
+def gitbookMetadata(metadata: dict) -> str:
+    return '---\ndescription: 作者：%s\n---\n\n# %s\n\n' % (
+        metadata['author'], metadata['name']
+    ) + '<figure><img src="%s" alt=""><figcaption><p>%s</p></figcaption></figure>\n\n' % (
+        'assets/cover.jpg', metadata['name']
+    ) + '\n>\n'.join(['> %s' % x for x in metadata['desc']]) + '\n\n'
+
+
+def gitbookChapterPath(caption: str) -> str:
+    chapterNum = re.search(r'^第(\d+)章', caption)[1]  # match chapter number
+    chapterNum = '0' * (3 - len(chapterNum)) + chapterNum  # add `0` prefix
+    return os.path.join('content', 'chapter-%s.md' % chapterNum)
+
+
+def gitbookSummary(chapters: dict) -> str:
+    summary = '# XXRS\n\n'
+    summary += '* [序言](README.md)\n\n'
+    summary += '## 内容 <a href="#content" id="content"></a>\n\n'
+    for caption in chapters:
+        summary += '* [%s](%s)\n' % (caption, gitbookChapterPath(caption))
+    return summary
+
+
+def gitbookChapters(chapters: dict) -> dict:
+    result = {}
+    for (caption, content) in chapters.items():
+        content = [markdownTransfer(x) for x in content]
+        result[gitbookChapterPath(caption)] = '# %s\n\n%s\n' % (
+            caption, '\n\n'.join(content)
+        )
+    return result