diff --git a/ci/tf/example.tfvars b/ci/tf/example.tfvars
index 4d96e5a..96af208 100644
--- a/ci/tf/example.tfvars
+++ b/ci/tf/example.tfvars
@@ -2,8 +2,9 @@ access_key=""
 secret_key=""
 key_pair_name=""
 key_pair_path=""
-zone_id="cn-beijing-b"
-region="cn-beijing"
+zone_id=""
+region=""
+instance_type="ecs.g3i.xlarge"
 vpc_name="my-ci-test"
 vpc_cidr="172.16.0.0/16"
 node_subnet_name="my-ci-node-subnet"
diff --git a/ci/tf/main.tf b/ci/tf/main.tf
index 4452282..c5a26d2 100644
--- a/ci/tf/main.tf
+++ b/ci/tf/main.tf
@@ -32,6 +32,10 @@ variable "zone_id" {
   type = string
 }
 
+variable "instance_type" {
+  type = string
+}
+
 variable "vpc_name" {
   type = string
 }
@@ -127,7 +131,7 @@ resource "volcengine_security_group_rule" "sg_rule_allow_api_server" {
 resource "volcengine_ecs_instance" "control_plane" {
   zone_id              = var.zone_id
   image_id             = "image-ybqi99s7yq8rx7mnk44b"
-  instance_type        = "ecs.g3i.xlarge"
+  instance_type        = var.instance_type
   instance_name        = var.control_plane_node_name
   description          = var.control_plane_node_name
   host_name            = var.control_plane_node_name
@@ -144,7 +148,7 @@ resource "volcengine_ecs_instance" "control_plane" {
 resource "volcengine_ecs_instance" "worker" {
   zone_id              = var.zone_id
   image_id             = "image-ybqi99s7yq8rx7mnk44b"
-  instance_type        = "ecs.g3i.xlarge"
+  instance_type        = var.instance_type
   instance_name        = var.worker_node_name
   description          = var.worker_node_name
   host_name            = var.worker_node_name
@@ -161,7 +165,7 @@ resource "volcengine_ecs_instance" "worker" {
 resource "volcengine_ecs_instance" "worker2" {
   zone_id              = var.zone_id
   image_id             = "image-ybqi99s7yq8rx7mnk44b"
-  instance_type        = "ecs.g3i.xlarge"
+  instance_type        = var.instance_type
   instance_name        = var.worker2_node_name
   description          = var.worker2_node_name
   host_name            = var.worker2_node_name