diff --git a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/README.md b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/README.md
index 8d7ac8384..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。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS](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..b4de073aa 100644
--- a/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/hifive1-rev-B/README.md
@@ -19,7 +19,7 @@ $ sudo apt install build-essential pkg-config
 $ sudo apt install gcc make libncurses5-dev openssl libssl-dev bison flex libelf-dev autoconf libtool gperf libc6-dev  git
 ```
 
-**源码下载：** XiUOS [https://www.gitlink.org.cn/xuos/xiuos](https://www.gitlink.org.cn/xuos/xiuos)
+**源码下载：** XiUOS [下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS]
 
 新建一个空文件夹并进入文件夹中，并下载源码，具体命令如下：
 
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/rv32m1-vega/README.md b/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/README.md
index 889b3ef43..04f1dd8c8 100755
--- a/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/README.md
+++ b/Ubiquitous/XiZi_IIoT/board/rv32m1-vega/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/，下载并解压。[下载网址 https://open-isa.org/downloads/]
+RISC-V: riscv-none-embed-，默认安装到Ubuntu的/opt/，下载并解压。[下载链接：https://pan.baidu.com/s/1mWlR86FMc-xPQwDXJ_hiQg 提取码：XUOS
 ![gnu](img/riscv_gnu.png)
 
 
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/