diff --git a/aks/README.md b/aks/README.md
index 19a5a44..73477cc 100644
--- a/aks/README.md
+++ b/aks/README.md
@@ -11,9 +11,9 @@ Azure Kubernetes Service is in **Public Preview**, this page provides best pract
 - AKS monitoring and logging are not available, there will be error when clicking on `Monitor containers` and `View logs` links in AKS overview page.
 
 - AKS addons are not enabled on Azure China yet, including `monitoring` and `http_application_routing` addons.
-
   > note: for [`http_application_routing`](https://docs.microsoft.com/en-us/azure/aks/http-application-routing) addon functionality, it's not for production use, you could use [ingress controller](https://docs.microsoft.com/en-us/azure/aks/ingress-basic) instead.
 
+- Preview features on Global Azure won't be supported on Azure China, e.g. [Cluster-autoscaler](https://docs.microsoft.com/en-us/azure/aks/cluster-autoscaler), [Network Policy](https://docs.microsoft.com/en-us/azure/aks/use-network-policies)
 - AAD support requires kubectl version >v1.14.0-beta.0
 
 ## 1. How to create AKS on Azure China
@@ -171,7 +171,7 @@ Follow detailed steps in [Cluster Autoscaler on Azure Kubernetes Service (AKS) -
  
 ### Tips
 
-- For production usage, agent VM size should have at least 4 CPU cores(e.g. D3_v2) since k8s components would also occupy CPU, memory resource on the node, details about [AKS resource reservation](https://docs.microsoft.com/en-us/azure/aks/concepts-clusters-workloads#resource-reservations).
+- For production usage, agent VM size should have at least 4 CPU cores(e.g. D3_v2) since k8s components would also occupy CPU, memory resources on the node, details about [AKS resource reservation](https://docs.microsoft.com/en-us/azure/aks/concepts-clusters-workloads#resource-reservations).
 
 - [GPU workload support best practices on Azure China](./gpu-support.md)