diff --git a/README.md b/README.md
index d0b55e8..be2b67a 100644
--- a/README.md
+++ b/README.md
@@ -35,59 +35,13 @@ a VPN tunnel to the `Hub Cluster` and create tunnels to other cnf replicas on di
 Additionally, all workload pods in the clusters will have a second network interface allocated by the ``cnf`` pod on the
 same node, with this second interface assigned to the ``cnf`` network namespace.
 
-## Helm Chart Installation
+## Helm Chart Installation and Clear
 
 `Nauti` is pretty easy to install with `Helm`. Make sure you already have at least 2 Kubernetes clusters,
-please refer to this installation guide.
+please refer to this installation guide. [Helm Chart Page](https://nauti-io.github.io/nauti-charts/）
 
-[Helm Chart Page](https://nauti-io.github.io/nauti-charts/）
-
-### Set Global CIDR
-`Global CIDR` is used in parallel network connection, it should not be conflict or overlap with cluster `Pod`
-or `Service` CIDR, it's `10.112.0.0/12` by default.
-
-### Install in Hub
-`Hub` is a kubernetes which has a public IP exposed,
-  ```shell
-  $ helm repo add nauti https://nauti-io.github.io/nauti-charts
-  "mcs" has been added to your repositories
-  $ helm repo list
-  NAME    URL
-  nauti     https://nauti-io.github.io/nauti-charts
-  $ helm search repo nauti
-NAME             	CHART VERSION	APP VERSION	DESCRIPTION
-nauti/nauti      	0.1.0        	1.16.0     	A Helm chart for Tunnel across clusters.
-nauti/nauti-agent	0.1.0        	1.0.0      	A Helm chart for Tunnel across clusters.
-  $ helm install nauti nauti/nauti --namespace nauti-system  --create-namespace \
---set tunnel.endpoint=<Hub Pubic IP>   --set tunnel.cidr=20.112.0.0/12
-  NAME: nauti
-  LAST DEPLOYED: Fri Mar 31 12:43:43 2024
-  NAMESPACE: nauti-system
-  STATUS: deployed
-  REVISION: 1
-  TEST SUITE: None
-  
-  Thank you for installing nauti.
-  Your release is named nauti.
-
-  Continue to install nauti-agent on clusters, with bootstrap token: re51os.131tn13kek2iaqoz
-  And install nauti-agent in cluster by:
-  
-helm install nauti-agent mcs/nauti-agent --namespace  nauti-system  --create-namespace   \
---set hub.hubURL=https:/<Hub Pubic IP>:6443 --set cluster.clusterID=cluster1
-  ```
-
-
-### Install in Cluster
-Joining a cluster, make sure clusterID and tunnel.cidr is unique. We don't require cluster has a public IP.
-  ```shell
-  $ helm repo add nauti https://nauti-io.github.io/nauti-charts
-  "nauti" has been added to your repositories
-  
-  $ helm install nauti-agent nauti/nauti-agent --namespace nauti-system  --create-namespace \
---set hub.hubURL=https://<Hub Public IP>:6443 --set cluster.clusterID=<Cluster Alias Name>
-```
-Add cross cluster DNS config segment, in `coredns` configmap, and restart coredns pods.
+After the installation, add cross cluster DNS config segment, in `coredns` configmap, and restart coredns pods.
+The `cluster-ip` of `crossdns` is a static cluster IP, usually `10.96.0.11` , check before setting.
   ```yaml
     hyperos.local:53 {
         forward . 10.96.0.11
@@ -132,11 +86,6 @@ Test it in another cluster.
   </body>
   </html>
   ```
-## Clear All
-  ```shell
-  $ helm uninstall nauti -n nauti-system
-  $ kubectl delete ns nauti-system
-  ```