diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 3729f6a5..00000000
--- a/.gitignore
+++ /dev/null
@@ -1,91 +0,0 @@
-# Byte-compiled / optimized / DLL files
-__pycache__/
-*.py[cod]
-*$py.class
-
-# C extensions
-*.so
-
-# Distribution / packaging
-.Python
-env/
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-*.egg-info/
-.installed.cfg
-*.egg
-
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
-
-# Installer logs
-pip-log.txt
-pip-delete-this-directory.txt
-
-# Unit test / coverage reports
-htmlcov/
-.tox/
-.coverage
-.coverage.*
-.cache
-nosetests.xml
-coverage.xml
-*,cover
-.hypothesis/
-
-# Translations
-*.mo
-*.pot
-
-# Django stuff:
-*.log
-local_settings.py
-
-# Flask stuff:
-instance/
-.webassets-cache
-
-# Scrapy stuff:
-.scrapy
-
-# Sphinx documentation
-docs/_build/
-
-# PyBuilder
-target/
-
-# IPython Notebook
-.ipynb_checkpoints
-
-# pyenv
-.python-version
-
-# celery beat schedule file
-celerybeat-schedule
-
-# dotenv
-.env
-
-# virtualenv
-venv/
-ENV/
-
-# Spyder project settings
-.spyderproject
-
-# Rope project settings
-.ropeproject
-.vscode
-.idea
\ No newline at end of file
diff --git a/README.md b/README.md
index 903f3762..f940a1f5 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,16 @@
 * 15) 大数据与MapReduce
     * [大数据与MapReduce](./docs/15.大数据与MapReduce.md)
 
+## 第五部分  项目实战(非课本内容 来之ApacheCN Team)
+
+* 16) 推荐系统
+    * [推荐系统](/docs/16.推荐系统.md)
+    * [后续 翻译完Spark ML继续跟进该项目, 欢迎有兴趣的朋友参与开源公益的活动]
+
+## 阶段性总结
+
+* [2017-04-08_第一期的总结](/report/2017-04-08_第一期的总结.md)
+
 * * *
 
 * 附录A Python入门
@@ -53,3 +63,5 @@
 * 索引
 * 版权声明
 * [ApacheCN(apache中文网) 维护更新](http://www.apache.wiki/display/ML)
+    * [关于我们](http://www.apache.wiki/pages/viewpage.action?pageId=2887240)
+    * [加入我们](http://www.apache.wiki/pages/viewpage.action?pageId=2887239)
diff --git a/docs/13.利用PCA来简化数据.md b/docs/13.利用PCA来简化数据.md
index 80ae0466..4a7bdcad 100644
--- a/docs/13.利用PCA来简化数据.md
+++ b/docs/13.利用PCA来简化数据.md
@@ -1,5 +1,7 @@
 # 13) 利用PCA来简化数据
 
+![利用PCA简化数据_首页](/images/13.PCA/利用PCA简化数据_首页.jpg)
+
 > 场景描述：
 
 * 我们正通过电视而非现场观看体育比赛，在电视的纯平显示器上有一个球。
diff --git a/docs/16.推荐系统.md b/docs/16.推荐系统.md
new file mode 100644
index 00000000..e69de29b
diff --git a/images/13.PCA/利用PCA简化数据_首页.jpg b/images/13.PCA/利用PCA简化数据_首页.jpg
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diff --git a/report/2017-04-08_第一期的总结.md b/report/2017-04-08_第一期的总结.md
new file mode 100644
index 00000000..e69de29b