diff --git a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/README.md b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/README.md
index c65511c16..f29654841 100644
--- a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/README.md
@@ -65,7 +65,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/gapuino/README.md b/Ubiquitous/XiZi_IIoT/board/gapuino/README.md
index 9daf41671..b718d9e29 100755
--- a/Ubiquitous/XiZi_IIoT/board/gapuino/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/gapuino/README.md
@@ -68,7 +68,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/hifive1-emulator/README.md b/Ubiquitous/XiZi_IIoT/board/hifive1-emulator/README.md
index 4e8db0d1b..2ada64bee 100644
--- a/Ubiquitous/XiZi_IIoT/board/hifive1-emulator/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/hifive1-emulator/README.md
@@ -84,7 +84,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)，下载完成后，执行以下命令：
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]，下载完成后，执行以下命令：
 
 ```c
 sudo tar -xvjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md b/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
index 6a25be059..7b8201710 100644
--- a/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
@@ -71,7 +71,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/k210-emulator/README.md b/Ubiquitous/XiZi_IIoT/board/k210-emulator/README.md
index cbf4d7d49..52b314074 100644
--- a/Ubiquitous/XiZi_IIoT/board/k210-emulator/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/k210-emulator/README.md
@@ -82,7 +82,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)，下载完成后，执行以下命令：
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]，下载完成后，执行以下命令：
 
 ```c
 sudo tar -xvjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/kd233/README.md b/Ubiquitous/XiZi_IIoT/board/kd233/README.md
index 4b86c7e56..cc6bfb67e 100644
--- a/Ubiquitous/XiZi_IIoT/board/kd233/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/kd233/README.md
@@ -67,7 +67,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/
diff --git a/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/README.md b/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/README.md
index ee278d46d..37316d895 100644
--- a/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/README.md
@@ -65,7 +65,7 @@ cd kconfig-frontends
 
 ### 编译工具链：
 
-RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载网址 http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2](http://101.36.126.201:8011/gnu-mcu-eclipse.tar.bz2)
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载源码并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 ```shell
 $ tar -xjf gnu-mcu-eclipse.tar.bz2 -C /opt/