diff --git a/README.md b/README.md
index b89cc10b..1f246ec8 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,11 @@ If you are personal user and don't know which to choose, please use `Smart Home`
 Before configuration, please goto [Tuya IoT Platform](https://iot.tuya.com)
 - Create a cloud develop project.
 - Go to `Project Page` > `Devices Panel` > `Link Tuya App Account`, link your app account.
+- Go to `Project Page` > `Service API` > `Go to Authorize`, subscribe the following APIs (its free):
+    - Authorization Token Management
+    - Device Status Notification
+    - IoT Core
+    - Industry Project Client Service (for "Custom" project)
 
 #### For "Custom" Project