diff --git a/README.md b/README.md
index 5746fb84..7c1ddd3a 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ jmcomic.download_album('422866')  # 传入要下载的album的id，即可下载
 # 如果你想要配置，请参考assets/config/和usgae/下的文档和示例.
 ```
 
-进一步的使用可以参考usage文件夹下的示例代码: `getting_started.py` `sample_usage.py`
+进一步的使用可以参考usage文件夹下的示例代码: `getting_started.py` `usage_simple.py` `usage_feature_filter`
 
 ## 项目特点
 
@@ -42,7 +42,7 @@ jmcomic.download_album('422866')  # 传入要下载的album的id，即可下载
 - **可配置性强**
   - 不配置也能使用，十分方便
   - 配置可以从**配置文件**生成，支持多种文件格式，无需写Python代码
-  - 配置点有：`是否使用磁盘缓存` `图片类型转换` `下载路径` `请求元信息（headers,cookies,代理）`等 
+  - 配置点有：`是否使用磁盘缓存` `图片类型转换` `下载路径` `请求元信息（headers,cookies,代理）`等
 - **可扩展性强**
   - 支持自定义本子/章节/图片下载前后的回调函数
   - 支持自定义debug日志的开关/格式
diff --git a/setup.py b/setup.py
index 0c9a99fe..47b135ac 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
     package_dir={"": "src"},
     python_requires=">=3.7",
     install_requires=[
-        'commonX',
+        'commonX>=0.5.3',
         'curl_cffi',
         'PyYAML',
         'Pillow',
diff --git a/src/jmcomic/__init__.py b/src/jmcomic/__init__.py
index 759f0ac7..1b9e0b77 100644
--- a/src/jmcomic/__init__.py
+++ b/src/jmcomic/__init__.py
@@ -2,6 +2,6 @@
 # 被依赖方 <--- 使用方
 # config <--- entity <--- toolkit <--- client <--- option <--- downloader
 
-__version__ = '2.1.13'
+__version__ = '2.1.14'
 
 from .api import *
diff --git a/src/jmcomic/jm_client_impl.py b/src/jmcomic/jm_client_impl.py
index 2b6fd984..2efa0587 100644
--- a/src/jmcomic/jm_client_impl.py
+++ b/src/jmcomic/jm_client_impl.py
@@ -420,3 +420,7 @@ def __init__(self, workers=None) -> None:
     def save_image_resp(self, *args, **kwargs):
         future = self.executor.submit(lambda: super().save_image_resp(*args, **kwargs))
         self.future_list.append(future)
+
+
+JmModuleConfig.CLASS_CLIENT_IMPL['html'] = JmHtmlClient
+JmModuleConfig.CLASS_CLIENT_IMPL['api'] = JmApiClient
diff --git a/src/jmcomic/jm_client_interface.py b/src/jmcomic/jm_client_interface.py
index 4589da29..b528b19f 100644
--- a/src/jmcomic/jm_client_interface.py
+++ b/src/jmcomic/jm_client_interface.py
@@ -221,7 +221,7 @@ class JmImageClient:
     def download_image(self,
                        img_url: str,
                        img_save_path: str,
-                       scramble_id: str,
+                       scramble_id=None,
                        decode_image=True,
                        ):
         """
@@ -231,6 +231,10 @@ def download_image(self,
         @param scramble_id: 图片所在photo的scramble_id
         @param decode_image: 要保存的是解密后的图还是原图
         """
+        if scramble_id is None:
+            # 大多数情况下，scramble_id = photo_id
+            scramble_id = JmcomicText.parse_to_photo_id(scramble_id)
+
         # 请求图片
         resp = self.get_jm_image(img_url)
 
diff --git a/src/jmcomic/jm_config.py b/src/jmcomic/jm_config.py
index a8396c1c..90f9d7cd 100644
--- a/src/jmcomic/jm_config.py
+++ b/src/jmcomic/jm_config.py
@@ -56,6 +56,7 @@ class JmModuleConfig:
     CLASS_OPTION = None
     CLASS_ALBUM = None
     CLASS_PHOTO = None
+    CLASS_CLIENT_IMPL = {}
 
     # 执行debug的函数
     debug_executor = default_jm_debug
@@ -96,6 +97,16 @@ def photo_class(cls):
         from .jm_entity import JmPhotoDetail
         return JmPhotoDetail
 
+    @classmethod
+    def client_impl_class(cls, client_key: str):
+        client_impl_dict = cls.CLASS_CLIENT_IMPL
+
+        impl_class = client_impl_dict.get(client_key, None)
+        if impl_class is None:
+            raise NotImplementedError(f'not found client impl class for key: "{client_key}"')
+
+        return impl_class
+
     @classmethod
     @field_cache("DOMAIN")
     def domain(cls, postman=None):
diff --git a/src/jmcomic/jm_entity.py b/src/jmcomic/jm_entity.py
index f5236f03..15d9eab2 100644
--- a/src/jmcomic/jm_entity.py
+++ b/src/jmcomic/jm_entity.py
@@ -318,10 +318,12 @@ def __init__(self,
 
         # 有的 album 没有章节，则自成一章。
         if len(episode_list) == 0:
-            # photo_id, photo_index_of_album, photo_title, photo_pub_date
-            episode_list = [(album_id, 0, title, pub_date)]
+            # photo_id, photo_index, photo_title, photo_pub_date
+            episode_list = [(album_id, 1, title, pub_date)]
+        else:
+            episode_list = self.distinct_episode(episode_list)
 
-        self.episode_list: List[Tuple] = self.distinct_episode(episode_list)
+        self.episode_list: List[Tuple] = episode_list
 
     def create_photo_detail(self, index) -> Tuple[JmPhotoDetail, Tuple]:
         # 校验参数
@@ -332,7 +334,7 @@ def create_photo_detail(self, index) -> Tuple[JmPhotoDetail, Tuple]:
 
         # episode_info: ('212214', '81', '94 突然打來', '2020-08-29')
         episode_info: tuple = self.episode_list[index]
-        photo_id, photo_index_of_album, photo_title, photo_pub_date = episode_info
+        photo_id, photo_index, photo_title, photo_pub_date = episode_info
 
         photo = JmPhotoDetail(
             photo_id=photo_id,
@@ -340,7 +342,7 @@ def create_photo_detail(self, index) -> Tuple[JmPhotoDetail, Tuple]:
             title=photo_title,
             keywords='',
             series_id=self.album_id,
-            sort=episode_info[1] if len(self) != 1 else 1,
+            sort=photo_index,
             author=self.author,
             from_album=self,
             page_arr=None,
diff --git a/src/jmcomic/jm_option.py b/src/jmcomic/jm_option.py
index c87d26cb..84b0d183 100644
--- a/src/jmcomic/jm_option.py
+++ b/src/jmcomic/jm_option.py
@@ -222,12 +222,6 @@ def to_file(self, filepath=None):
     下面是 build 方法
     """
 
-    # 缓存
-    jm_client_impl_mapping: Dict[str, Type[AbstractJmClient]] = {
-        'html': JmHtmlClient,
-        'api': JmApiClient,
-    }
-
     @field_cache("__jm_client_cache__")
     def build_jm_client(self, **kwargs) -> JmcomicClient:
         """
@@ -255,7 +249,7 @@ def new_jm_client(self, **kwargs) -> JmcomicClient:
             domain_list = [JmcomicText.parse_to_jm_domain(JmModuleConfig.get_jmcomic_url(postman))]
 
         # client
-        client = self.jm_client_impl_mapping[self.client.impl](
+        client = JmModuleConfig.client_impl_class(self.client.impl)(
             postman,
             self.client.retry_times,
             fallback_domain_list=domain_list,
diff --git a/usage/usage_feature_filter.py b/usage/usage_feature_filter.py
new file mode 100644
index 00000000..f5536811
--- /dev/null
+++ b/usage/usage_feature_filter.py
@@ -0,0 +1,72 @@
+"""
+
+本文件演示 jmcomic 的filter（过滤器）
+利用filter，你可以实现下载时过滤本子/章节/图片，完全控制你要下载的内容。
+
+使用filter的步骤如下：
+1. 自定义class，继承JmDownloader，重写filter_iter_objs方法，即:
+    class MyDownloader(JmDownloader):
+        def filter_iter_objs(self, iter_objs: DownloadIterObjs):
+            # 如何重写？参考JmDownloader.filter_iter_objs和下面的示例
+            ...
+
+2. 让你的class生效，使用如下代码：
+    JmModuleConfig.CLASS_DOWNLOADER = MyDownloader
+
+3. 照常使用下载api:
+    download_album(xxx, option)
+
+** 本文件下面的示例只演示步骤1 **
+
+本文件包含如下示例：
+- 只下载本子的特定章节以后的章节
+- 只下载章节的前三张图
+
+
+"""
+
+from jmcomic import *
+
+
+# 示例：只下载本子的特定章节以后的章节
+# 参考：https://github.com/hect0x7/JMComic-Crawler-Python/issues/95
+class FindUpdateDownloader(JmDownloader):
+    album_after_photo = {
+        'xxx': 'yyy'
+    }
+
+    def filter_iter_objs(self, iter_objs: DownloadIterObjs):
+        if not isinstance(iter_objs, JmAlbumDetail):
+            return iter_objs
+
+        return self.find_update(iter_objs)
+
+    # 带入漫画id, 章节id(第x章)，寻找该漫画下第x章节後的所有章节Id
+    def find_update(self, album: JmAlbumDetail):
+        if album.album_id not in self.album_after_photo:
+            return album
+
+        photo_ls = []
+        photo_begin = self.album_after_photo[album.album_id]
+        is_new_photo = False
+
+        for photo in album:
+            if is_new_photo:
+                photo_ls.append(photo)
+
+            if photo.photo_id == photo_begin:
+                is_new_photo = True
+
+        return photo_ls
+
+
+# 示例：只下载章节的前三张图
+class First3ImageDownloader(JmDownloader):
+
+    def filter_iter_objs(self, iter_objs: DownloadIterObjs):
+        if isinstance(iter_objs, JmPhotoDetail):
+            photo: JmPhotoDetail = iter_objs
+            # 支持[start,end,step]
+            return photo[:3]
+
+        return iter_objs
diff --git a/usage/sample_usage.py b/usage/usage_simple.py
similarity index 86%
rename from usage/sample_usage.py
rename to usage/usage_simple.py
index 637e6ed2..d08882b7 100644
--- a/usage/sample_usage.py
+++ b/usage/usage_simple.py
@@ -1,3 +1,13 @@
+"""
+
+本文件仅演示一些简单的api使用，包含以下内容：
+1. 下载本子
+2. 获取实体类（本子/章节/图片）
+3. 搜索本子
+4. 搜索并下载本子（以下载带有 [無修正] 标签的本子为例）
+
+"""
+
 from jmcomic import *
 
 option = create_option(
@@ -6,7 +16,7 @@
 client = option.build_jm_client()
 
 
-@timeit('下载本子集: ')
+@timeit('下载本子: ')
 def download_jm_album():
     ls = str_to_list('''
     438696
@@ -54,6 +64,7 @@ def search_jm_album():
 @timeit('搜索并下载本子: ')
 def search_and_download():
     tag = '無修正'
+    # 搜索第一页
     search_page: JmSearchPage = client.search_album(tag, main_tag=3)
 
     id_list = []