diff --git a/README.md b/README.md
index 20abed2..562f10a 100644
--- a/README.md
+++ b/README.md
@@ -6,21 +6,30 @@ English | [简体中文](README.zh-CN.md)
 
 ![Poster](https://repository-images.githubusercontent.com/403563361/0a315f6a-7cae-48d7-bfd4-d6fac5415d7c)
 
+(According to [official website](http://office.frogtosea.com/jjfa), maybe there are also normal-, piggy- and frog-shaped printers with these models)
+
 ## Features
 
 - Print jpg/png images directly to cat printer from a web interface
 - Print a document (.doc, .docx, .odt etc) by copy-paste
+- Custom print content, put text, image, QRcode on a canvas
 - (more will be here...)
 
 ## How to use
 
-TODO
+On Windows:
 
-Currently, with Python3 and Bleak, open `server.py` and go to `http://localhost:8095` in browser, open cat printer and bluetooth of your computer, then do the works.
+- Get a release, extract, open `start.bat`.
+- Make sure bluetooth of your computer is opened and cat printer is launched.
+
+On GNU/Linux:
+
+- You can also use a Windows release, or prepare dependencies according to developer note.
+- Open `server.py` in `printer` folder with `python3`.
 
 ## Why?
 
-These bluetooth cat printers, with module name GB01, GB02 and GT01, have poor support at applications.
+These bluetooth cat printers, with model name GB01, GB02 and GT01, have poor support at applications.
 
 Official apps are, proprietary, also have only mobile version.
 
@@ -30,7 +39,7 @@ Thankfully, people here are really warm-hearted, logged their experiences online
 
 ## Developer Note
 
-This application uses server/client module, and have fewest possible dependencies on server side.
+This application uses server/client model, and have fewest possible dependencies on server side.
 
 ### Prepare
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index e260c4c..c287758 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -6,17 +6,26 @@
 
 ![Poster](https://repository-images.githubusercontent.com/403563361/0a315f6a-7cae-48d7-bfd4-d6fac5415d7c)
 
+（根据[官网](http://office.frogtosea.com/jjfa)，可能也有普通/猪猪/青蛙外观的打印机拥有此种型号）
+
 ## 功能
 
 - 直接从网页界面打印 jpg/png 图像到猫咪打印机
 - 复制粘贴文档内容（.doc, .docx, .odt 等）以打印
+- 自定义打印内容，在画布上放置文字、图片、二维码
 - （会有更多……）
 
 ## 如何使用
 
-TODO
+在 Windows 上：
 
-当前，使用 Python3 和 Bleak，打开 `server.py`，在浏览器访问 `http://localhost:8095`，开启猫咪打印机和电脑蓝牙，然后做自己想要的。
+- 获取一份 release，解压，打开 `start.bat`
+- 确保电脑蓝牙开启且猫咪打印机已启动。
+
+在 GNU/Linux：
+
+- 您也可以使用 Windows release，或者依开发者注记准备依赖。
+- 使用 `python3` 打开位于 `printer` 文件夹的 `server.py`。
 
 ## 为什么？