diff --git a/README.md b/README.md
index 3c877f8..ddbc878 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,29 @@
-# qrbtf.com
+# QRBTF
 
-A simple online tool to beautify your QR code.
\ No newline at end of file
+A simple online tool to beautify your QR code.
+
+URL: [qrbtf.com](https://qrbtf.com)
+
+中文介绍: [如何制作一个漂亮的二维码](https://mp.weixin.qq.com/s/_Oy9I9FqPXhfwN9IUhf6_g)
+
+## Installation
+
+``` bash
+cd ..
+npm install
+npm start
+```
+
+## Usage
+
+1. Open [qrbtf.com](https://qrbtf.com).
+2. Enter a URL or text.
+3. Select a style.
+4. Adjust parameters.
+5. Download `JPG` or `SVG`.
+
+## Examples
+
+![QR code style C2](https://blog.ciaochaos.com/projects/qrcode/qr2.jpg)
+
+![QR codes](https://blog.ciaochaos.com/projects/qrcode/qrs.jpg)
\ No newline at end of file
diff --git a/src/components/app/PartDownload.js b/src/components/app/PartDownload.js
index bc998b4..1abef19 100644
--- a/src/components/app/PartDownload.js
+++ b/src/components/app/PartDownload.js
@@ -44,7 +44,7 @@ const PartDownload = ({ value, downloadCount, onSvgDownload, onJpgDownload }) =>
             </div>
             <div>
                 {
-                    imgData.length > 0 ? <div id="dl-image"><div id="dl-image-inner"><img id="dl-image-inner-jpg" src={imgData} alt="点击JPG下载" /></div></div> : null
+                    imgData.length > 0 ? <div id="dl-image"><div id="dl-image-inner"><img id="dl-image-inner-jpg" src={imgData} alt="长按保存二维码" /></div></div> : null
                 }
             </div>
         </div>