diff --git a/README.md b/README.md
index 23fc4fd..1e09707 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ This is a work in progress.
 
 #####[zlib&libpng Windows32 GCC's Course](https://github.com/go-vgo/Mingw32)
 
-#####[Download include zlib&libpng Windows GCC](https://github.com/go-vgo/Mingw)
+#####[Download include zlib&libpng Windows64 GCC](https://github.com/go-vgo/Mingw)
 
 ####For everything else:
     GCC
diff --git a/README_zh.md b/README_zh.md
index ba8abaa..78ca446 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -35,7 +35,7 @@ RobotGo 支持 Mac, Windows, and Linux(X11).
     MinGW or other GCC
 
 #####[zlib&libpng Windows32 GCC教程](https://github.com/go-vgo/Mingw32)
-#####[下载包含zlib和libpng的MinGW](https://github.com/go-vgo/Mingw)
+#####[下载包含zlib和libpng的64位MinGW](https://github.com/go-vgo/Mingw)
 
 ####For everything else(Linux等其他系统):
     GCC
diff --git a/doc.md b/doc.md
index 4258643..a572e06 100644
--- a/doc.md
+++ b/doc.md
@@ -231,7 +231,6 @@ robotgo.ScrollMouse(50, "down");
 
 ###.FindBitmap
 
-
     find bitmap.
 
 ####Arguments:
@@ -245,7 +244,6 @@ robotgo.ScrollMouse(50, "down");
 
 ###.OpenBitmap
 
-
     open bitmap .
 
 ####Arguments:
@@ -258,7 +256,6 @@ robotgo.ScrollMouse(50, "down");
 
 ###.SaveBitmap
 
-
     save a image with bitmap.
 
 ####Arguments:
@@ -269,13 +266,12 @@ robotgo.ScrollMouse(50, "down");
 
 ####Return:
 
-    Returns a imgage
+    Return a imgage
 
 
 ###.TostringBitmap
 
-
-     bitmap to string .
+     bitmap to string
 
 ####Arguments:
 
@@ -283,5 +279,5 @@ robotgo.ScrollMouse(50, "down");
 
 ####Return:
 
-    Returns a sting bitmap        
+    Return a sting bitmap        
     
diff --git a/zh_doc.md b/zh_doc.md
index d2ec35f..e101bb7 100644
--- a/zh_doc.md
+++ b/zh_doc.md
@@ -241,7 +241,7 @@ robotgo.ScrollMouse(50, "down");
 
 ####返回值:
 
-    Returns a bitmap object.
+    返回一个bitmap object.
 
 ##位图
 
@@ -249,58 +249,54 @@ robotgo.ScrollMouse(50, "down");
 
 ###.FindBitmap
 
+    查找bitmap.
 
-    find bitmap.
-
-####Arguments:
+####参数:
 
     bitmap
 
 ####Return:
 
-    Returns a position x and y
+    查找到,返回bitmap的x和y坐标;没有返回nil
 
 
 ###.OpenBitmap
 
+    打开bitmap图片.
 
-    open bitmap .
+####参数:
 
-####Arguments:
+    bitmap图片路径
 
-    bitmap image path 
+####返回值:
 
-####Return:
-
-    Returns a bitmap
+     返回一个bitmap对象
 
 ###.SaveBitmap
 
+    保存一个bitmap图片.
 
-    save a image with bitmap.
+####参数:
 
-####Arguments:
-
-    bitmap,
-    path,
+    bitmap对象,
+    保存路径,
     imagetype(int) 
 
-####Return:
+####返回值:
 
-    Returns a imgage
+    保存图片
 
 
 ###.TostringBitmap
 
+     将一个bitmap对象转换为字符串对象.
 
-     bitmap to string .
+####参数:
 
-####Arguments:
-
-    bitmap 
+    bitmap对象 
 
 ####Return:
 
-    Returns a sting bitmap 
+    返回一个bitmap字符串