diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30b641e..bac0790 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,3 @@
-## 1.3.0 (Unreleased)
 ## 1.2.1 (2025-03-14)
 
 - examples/complete: improve the examples [GH-7](https://github.com/alibabacloud-automation/terraform-alicloud-ecommerce-elasticsearch/pull/7)
diff --git a/examples/complete/main.tf b/examples/complete/main.tf
index 2baf719..6f6084e 100644
--- a/examples/complete/main.tf
+++ b/examples/complete/main.tf
@@ -1,3 +1,7 @@
+provider "alicloud" {
+  region = "ap-southeast-5"
+}
+
 data "alicloud_db_zones" "default" {
   engine                   = "MySQL"
   engine_version           = "8.0"
@@ -7,14 +11,16 @@ data "alicloud_db_zones" "default" {
 }
 
 data "alicloud_images" "default" {
-  name_regex = "^centos_6"
+  instance_type = data.alicloud_instance_types.default.instance_types[0].id
+  owners        = "system"
+  most_recent   = true
 }
 
 data "alicloud_instance_types" "default" {
   availability_zone    = data.alicloud_db_zones.default.zones[0].id
   cpu_core_count       = 2
   memory_size          = 8
-  instance_type_family = "ecs.g6"
+  instance_type_family = "ecs.g9i"
 }
 
 data "alicloud_db_instance_classes" "default" {
@@ -62,7 +68,7 @@ module "example" {
   internet_max_bandwidth_out = 0
   ecs_password               = var.ecs_password
   ecs_charge_type            = var.ecs_charge_type
-  disk_category              = "cloud_efficiency"
+  disk_category              = "cloud_essd"
   system_disk_size           = var.system_disk_size
 
   #alicloud_eip_address
@@ -74,6 +80,7 @@ module "example" {
   #alicloud_db_instance
   engine               = "MySQL"
   engine_version       = "8.0"
+  category             = "Basic"
   instance_type        = data.alicloud_db_instance_classes.default.instance_classes[1].instance_class
   instance_storage     = var.instance_storage
   instance_charge_type = var.instance_charge_type
diff --git a/main.tf b/main.tf
index 26e2efd..5209188 100644
--- a/main.tf
+++ b/main.tf
@@ -98,6 +98,7 @@ resource "alicloud_db_instance" "rds" {
   instance_type            = var.instance_type
   instance_storage         = var.instance_storage
   instance_charge_type     = var.instance_charge_type
+  category                 = var.category
   db_instance_storage_type = var.db_storage_type
   zone_id                  = var.rds_zone_id
   vswitch_id               = element(split(",", join(",", alicloud_vswitch.vswitch[*].id)), 1)
diff --git a/variables.tf b/variables.tf
index c59d30b..674d5e6 100644
--- a/variables.tf
+++ b/variables.tf
@@ -209,6 +209,12 @@ variable "instance_charge_type" {
   default     = "Postpaid"
 }
 
+variable "category" {
+  description = "The category of the rds instance."
+  type        = string
+  default     = null
+}
+
 variable "db_storage_type" {
   description = "The DB instance storage type."
   type        = string