diff --git a/docs/product/enable_and_configure_IM.md b/docs/product/enable_and_configure_IM.md
index 5d2ee645b..0c15b2a78 100644
--- a/docs/product/enable_and_configure_IM.md
+++ b/docs/product/enable_and_configure_IM.md
@@ -140,7 +140,7 @@
 
 ![img](@static/images/callback/callback_purchase.png)
 
-4. 在支付页面，点击**立即支付**支付费用后即可使用
+4. 在支付页面，点击**立即支付**支付费用后即可使用。
 
 ![img](@static/images/callback/callback_payment.png)
 
diff --git a/static/images/callback/callback_payment.png b/static/images/callback/callback_payment.png
index 29a7dd520..6af7727b2 100644
Binary files a/static/images/callback/callback_payment.png and b/static/images/callback/callback_payment.png differ
diff --git a/static/images/callback/callback_purchase.png b/static/images/callback/callback_purchase.png
index a7eb6826b..8bfbc1711 100644
Binary files a/static/images/callback/callback_purchase.png and b/static/images/callback/callback_purchase.png differ
diff --git a/static/images/callback/post_delivery_rule_add.png b/static/images/callback/post_delivery_rule_add.png
index 9a9acd1f4..3448f88ff 100644
Binary files a/static/images/callback/post_delivery_rule_add.png and b/static/images/callback/post_delivery_rule_add.png differ