diff --git a/documents/solution/database/data-transmission-from-ECS-to-RDS.yml b/documents/solution/database/data-transmission-from-ECS-to-RDS.yml
index cc096eb4..34fc83dd 100644
--- a/documents/solution/database/data-transmission-from-ECS-to-RDS.yml
+++ b/documents/solution/database/data-transmission-from-ECS-to-RDS.yml
@@ -290,7 +290,8 @@ Resources:
         Ref: VSwitch
       VpcId:
         Ref: Vpc
-      InstanceType: ecs.g6.large
+      InstanceType:
+        Ref: EcsInstanceType
       SystemDiskCategory: cloud_efficiency
       AllocatePublicIP: false
       ZoneId: