diff --git a/rt-thread-version/rt-thread-nano/nano-ref/nano-device-pin/nano-device-pin.md b/rt-thread-version/rt-thread-nano/nano-ref/nano-device-pin/nano-device-pin.md
index 3fa15aeb73c8822d2f3f663457e724326c3f36f6..dcaa1ab06a0f2f4541f8bd4efc59813de070c148 100644
--- a/rt-thread-version/rt-thread-nano/nano-ref/nano-device-pin/nano-device-pin.md
+++ b/rt-thread-version/rt-thread-nano/nano-ref/nano-device-pin/nano-device-pin.md
@@ -114,7 +114,7 @@ rt_base_t rt_pin_get(const char *name);
 #endif
 ```
 
-3. 我们需要适配如上 7 个 PIN 设备 API ，参考实例：[drv_gpio.c](./demo_code/drv_gpio.c) 和 [drv_gpio.h](./demo_code/drv_gpio.h)。
+3. 我们需要适配如上 7 个 PIN 设备 API ，参考实例：[drv_gpio.c](https://gitee.com/rtthread/docs-online/tree/master/rt-thread-version/rt-thread-nano/nano-ref/nano-device-pin/demo_code/drv_gpio.c) 和 [drv_gpio.h](https://gitee.com/rtthread/docs-online/tree/master/rt-thread-version/rt-thread-nano/nano-ref/nano-device-pin/demo_code/drv_gpio.h)。
 
 ## 编写 PIN 设备使用示例