diff --git a/README.md b/README.md
index 5657d86..57c384e 100644
--- a/README.md
+++ b/README.md
@@ -173,7 +173,7 @@ Thanks for the help from the community, you all make GUI-lite better! And welcom
- QQ group code:
diff --git a/README_zh.md b/README_zh.md
index fde230b..28a86cf 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -170,7 +170,7 @@
- 开发者QQ群:
diff --git a/documents/HowToWork.md b/documents/HowToWork.md
index d2bbca6..12ce48b 100644
--- a/documents/HowToWork.md
+++ b/documents/HowToWork.md
@@ -13,7 +13,7 @@ Widgets management include:
- Dispatch/Response intput message: By analysis the location information from the message, GuiLite would find the widget which should be reponse, and call response function(e.g, on_mouse_click, on_keyboard_click)
- Dispatch/Response customer message: By analysis the ID of message, GuiLite would find response funciotn, and calll it(: on_timer, on_custmer_refresh)
-Rendring include:
+Rendering include:
- Draw pixel, line, rect
- Set frame layer; While your drawing, you should input frame layer index to make your drawing at a specific layer
- Update frame layer; While frame layer changed(e.g, open/close dialog), GuiLite would determine which pixel of frame layer should be display on screen
diff --git a/documents/qq.group-6.jpg b/documents/qq.group-6.jpg
new file mode 100644
index 0000000..d2e9769
Binary files /dev/null and b/documents/qq.group-6.jpg differ