diff --git a/config/_default/config.toml b/config/_default/config.toml
index 525496eba..4d368e3af 100644
--- a/config/_default/config.toml
+++ b/config/_default/config.toml
@@ -14,7 +14,7 @@ title = "KubeSphere | Enterprise container platform, built on Kubernetes"
 description = "KubeSphere is an open source container platform based on Kubernetes for enterprise app development and deployment, suppors installing anywhere from on-premise datacenter to any cloud to edge."
 keywords = "KubeSphere, Kubernetes Dashboard,  Install Enterprise Kubernetes, DevOps, container platform"
 
-mailchimpSubscribeUrl = "https://gmail.us18.list-manage.com/subscribe/post?u=553ce463e00897cc36ed80866&id=f4b5009074"
+mailchimpSubscribeUrl = "https://kubesphere.us10.list-manage.com/subscribe/post?u=c85ea2b944b08b951f607bdd4&id=83f673a2d9"
 
 gcs_engine_id = "018068616810858123755%3Apb1pt8sx6ve"
 
diff --git a/content/en/_index.md b/content/en/_index.md
index 66816bfb6..af8007712 100644
--- a/content/en/_index.md
+++ b/content/en/_index.md
@@ -107,14 +107,14 @@ section4:
 
     - name: Rich Observability
       icon: /images/home/rich.svg
-      content: Multi-dimensional monitoring metrics, multi-tenant log query and collection, and alerting and notification support
+      content: Multi-dimensional monitoring, events and audit logs query are supported; multi-tenant log query and collection, alerting and notification are built-in
       link: "../observability"
       color: green
 
     - name: DevOps System
       icon: /images/home/dev-ops.svg
-      content: Out-of-box CI/CD based on Jenkins, and automated workflow tools including S2I & B2I
-      link: "https://kubesphere.io/docs/installation/install-devops/"
+      content: Out-of-box CI/CD based on Jenkins, and automated workflow tools including Source-to-Image & Binary-to-Image
+      link: "/devops"
       color: orange
 
     - name: Multiple Storage Solutions
@@ -125,13 +125,13 @@ section4:
 
     - name: Multiple Network Solutions
       icon: /images/home/network.svg
-      content: Support Calico and Flannel, and provide load balancer plug-in Porter for Kubernetes installed on physical machines
+      content: Provide a <a class='inner-a' target='_blank' href='https://porterlb.io'>load balancer Porter</a> for bare metal Kubernetes, and offers network policy management, support Calico and Flannel CNI
       link: "https://kubesphere.io/docs/introduction/features/#multiple-network-solutions-support"
       color: green
 
     - name: Multi-cluster Management
       icon: /images/home/management.svg
-      content: Distribute applications across multiple clusters and cloud providers, and provide disaster recovery solutions and cross-cluster discovery
+      content: Distribute applications across multiple clusters and cloud providers, and provide disaster recovery solutions and cross-cluster observability
       check: true
       link: ""
       color: orange
diff --git a/content/en/observability/_index.md b/content/en/observability/_index.md
index 6f39a30de..85a47340e 100644
--- a/content/en/observability/_index.md
+++ b/content/en/observability/_index.md
@@ -42,7 +42,7 @@ section2:
 
 section3:
   title: See Cloud Native Observability in KubeSphere
-  image: /images/service-mesh/15.jpg
+  videoLink: https://www.youtube.com/embed/uf0TTowc56I
   content: Want to get started in action by following the hands-on lab?
   btnContent: Start Hands-on Lab
   link: https://kubesphere.io/docs/installation/intro/