diff --git a/.gitignore b/.gitignore
index 2f02054dcb59420ab6943105d40932901aac0436..b532495df2aedb0b2e957d5d86b6844fa68f3c1b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,7 @@ documentation/html
 *.d
 tools/kconfig-frontends/kconfig-mconf
 packages
+dist
 cconfig.h
 GPUCache
 
diff --git a/bsp/stm32/stm32f103-blue-pill/README.md b/bsp/stm32/stm32f103-blue-pill/README.md
index 77bbfbd6571440c461ed94ec7cb877912ace1db0..3f5fc6f5515c65106f456f1b912d285695290e63 100644
--- a/bsp/stm32/stm32f103-blue-pill/README.md
+++ b/bsp/stm32/stm32f103-blue-pill/README.md
@@ -218,7 +218,7 @@ Learn how to use RT-Thread ENV, click [Here](https://github.com/RT-Thread/rtthre
 
 Enable USB device.
 
-![putty](figures/usb_device1.png)
+![usb_device1](figures/usb_device1.png)
 
 
 
@@ -226,7 +226,7 @@ Enable USB device.
 
 Enable USB Device Driver and enable to use device as CDC device.
 
-![putty](figures/usb_device2.png)
+![usb_device2](figures/usb_device2.png)
 
 
 
@@ -234,7 +234,7 @@ Enable USB Device Driver and enable to use device as CDC device.
 
 Select VC (virtual console) software package.
 
-![putty](figures/vconsole.png)
+![vconsole](figures/vconsole.png)
 
 
 
@@ -247,7 +247,7 @@ rt_device_t dev = rt_device_find("vcom");
 vconsole_switch(dev);
 ```
 
-![putty](figures/usb_code.png)
+![usb_code](figures/usb_code.png)