diff --git a/README.md b/README.md
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--- a/README.md
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@@ -1,2 +1,4 @@
 # RobotArm
 基于STM32芯片的简易机械臂源码
+#### 成品：
+![demo1](https://raw.githubusercontent.com/jiacai-wang/RobotArm/master/demo.jpg)