diff --git a/01.fit_a_line/README.md b/01.fit_a_line/README.md
index ca220d494c64696531053c39452b9e051789136b..81c880867e8c601cec282ee7881521c2a3c8459b 100644
--- a/01.fit_a_line/README.md
+++ b/01.fit_a_line/README.md
@@ -2,7 +2,7 @@
 
 Let us begin the tutorial with a classical problem called Linear Regression \[[1](#References)\]. In this chapter, we will train a model from a realistic dataset to predict home prices. Some important concepts in Machine Learning will be covered through this example.
 
-The source code for this tutorial lives on [book/fit_a_line](https://github.com/PaddlePaddle/book/tree/develop/01.fit_a_line).For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code for this tutorial lives on [book/fit_a_line](https://github.com/PaddlePaddle/book/tree/develop/01.fit_a_line). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Problem Setup
 
diff --git a/01.fit_a_line/index.html b/01.fit_a_line/index.html
index 003dc6daff2865f78f2ae6fba45d672aff70daf8..8aa4b48a5758c2b98d98f198d1925968a6f00989 100644
--- a/01.fit_a_line/index.html
+++ b/01.fit_a_line/index.html
@@ -44,7 +44,7 @@
 
 Let us begin the tutorial with a classical problem called Linear Regression \[[1](#References)\]. In this chapter, we will train a model from a realistic dataset to predict home prices. Some important concepts in Machine Learning will be covered through this example.
 
-The source code for this tutorial lives on [book/fit_a_line](https://github.com/PaddlePaddle/book/tree/develop/01.fit_a_line).For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code for this tutorial lives on [book/fit_a_line](https://github.com/PaddlePaddle/book/tree/develop/01.fit_a_line). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Problem Setup
 
diff --git a/02.recognize_digits/README.md b/02.recognize_digits/README.md
index 21d16cd283935ce2547c80f2fd01304fb13c8128..8dabf54c41809f0420f0dda3fd97bc1d884b6fe8 100644
--- a/02.recognize_digits/README.md
+++ b/02.recognize_digits/README.md
@@ -1,7 +1,6 @@
 # Recognize Digits
 
-The source code for this tutorial is here:  [book/recognize_digits](https://github.com/PaddlePaddle/book/tree/develop/02.recognize_digits).
-For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code for this tutorial is here:  [book/recognize_digits](https://github.com/PaddlePaddle/book/tree/develop/02.recognize_digits). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Introduction
 When one learns to program, the first task is usually to write a program that prints "Hello World!".
diff --git a/02.recognize_digits/index.html b/02.recognize_digits/index.html
index 0aebee33ba840a7a290a8a2205f2283d24d95495..2e86cb8303bc71af3563324e0c9d048616c8b713 100644
--- a/02.recognize_digits/index.html
+++ b/02.recognize_digits/index.html
@@ -42,8 +42,7 @@
 <div id="markdown" style='display:none'>
 # Recognize Digits
 
-The source code for this tutorial is here:  [book/recognize_digits](https://github.com/PaddlePaddle/book/tree/develop/02.recognize_digits).
-For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code for this tutorial is here:  [book/recognize_digits](https://github.com/PaddlePaddle/book/tree/develop/02.recognize_digits). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Introduction
 When one learns to program, the first task is usually to write a program that prints "Hello World!".
diff --git a/03.image_classification/README.md b/03.image_classification/README.md
index b57b47ca4ff1957f56bb37c1a880e9274b5364c3..2b0d528b6d3c2b3da4299b2ef1262e637b27472c 100644
--- a/03.image_classification/README.md
+++ b/03.image_classification/README.md
@@ -2,7 +2,7 @@
 Image Classification
 =======================
 
-The source code for this chapter is at [book/image_classification](https://github.com/PaddlePaddle/book/tree/develop/03.image_classification).For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code for this chapter is at [book/image_classification](https://github.com/PaddlePaddle/book/tree/develop/03.image_classification). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Background
 
diff --git a/03.image_classification/index.html b/03.image_classification/index.html
index 63bd1d2d372790d39862d6d19906c6d0ac17ebbe..4da0476192aed70a99144052e3a74006dd9def11 100644
--- a/03.image_classification/index.html
+++ b/03.image_classification/index.html
@@ -44,7 +44,7 @@
 Image Classification
 =======================
 
-The source code for this chapter is at [book/image_classification](https://github.com/PaddlePaddle/book/tree/develop/03.image_classification).For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code for this chapter is at [book/image_classification](https://github.com/PaddlePaddle/book/tree/develop/03.image_classification). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Background
 
diff --git a/08.machine_translation/README.md b/08.machine_translation/README.md
index 7c1f47f9ff33b6ad7b4a0f5de2eaf77ea8671103..febd0cda12c62603d788f9fe976d1d7b2959133c 100644
--- a/08.machine_translation/README.md
+++ b/08.machine_translation/README.md
@@ -1,6 +1,6 @@
 # Machine Translation
 
-The source code of this tutorial is live at [book/machine_translation](https://github.com/PaddlePaddle/book/tree/develop/08.machine_translation).For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code of this tutorial is live at [book/machine_translation](https://github.com/PaddlePaddle/book/tree/develop/08.machine_translation). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Background
 
diff --git a/08.machine_translation/index.html b/08.machine_translation/index.html
index 852fd4354a1fc54ed2d4063064bd9c0d704ef5a6..cef1466c5d9464e11e83dbb3bfbebee7098fd89e 100644
--- a/08.machine_translation/index.html
+++ b/08.machine_translation/index.html
@@ -42,7 +42,7 @@
 <div id="markdown" style='display:none'>
 # Machine Translation
 
-The source code of this tutorial is live at [book/machine_translation](https://github.com/PaddlePaddle/book/tree/develop/08.machine_translation).For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
+The source code of this tutorial is live at [book/machine_translation](https://github.com/PaddlePaddle/book/tree/develop/08.machine_translation). For instructions on getting started with this book,see [Running This Book](https://github.com/PaddlePaddle/book/blob/develop/README.md#running-the-book).
 
 ## Background