diff --git a/docs/en/module/proto13.2_mesu.md b/docs/en/module/proto13.2_mesu.md
index 41f7344a..99507583 100644
--- a/docs/en/module/proto13.2_mesu.md
+++ b/docs/en/module/proto13.2_mesu.md
@@ -66,7 +66,7 @@
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5-module/products/com-proto-meas-module';
 
    anchor_search(purchase_link);
    scrollFunc();
diff --git a/docs/en/unit/can.md b/docs/en/unit/can.md
index b845e325..6075419d 100644
--- a/docs/en/unit/can.md
+++ b/docs/en/unit/can.md
@@ -145,7 +145,7 @@ It has obvious advantages in the following aspects: High speed low failure rate
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5-unit/products/canbus-unitca-is3050g';
 
    anchor_search(purchase_link);
    scrollFunc();
diff --git a/docs/zh_CN/module/proto13.2_mesu.md b/docs/zh_CN/module/proto13.2_mesu.md
index e701a25a..8b238dee 100644
--- a/docs/zh_CN/module/proto13.2_mesu.md
+++ b/docs/zh_CN/module/proto13.2_mesu.md
@@ -66,7 +66,7 @@
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5-module/products/com-proto-meas-module';
 
    anchor_search(purchase_link);
    scrollFunc();
diff --git a/docs/zh_CN/unit/can.md b/docs/zh_CN/unit/can.md
index a041702e..30bae350 100644
--- a/docs/zh_CN/unit/can.md
+++ b/docs/zh_CN/unit/can.md
@@ -138,7 +138,7 @@
 
 <script>
 
-   var purchase_link = '';
+   var purchase_link = 'https://m5stack.com/collections/m5-unit/products/canbus-unitca-is3050g';
 
    anchor_search(purchase_link);
    scrollFunc();