diff --git a/CHANGELOG.md b/CHANGELOG.md
index fc912cc2..f0d47154 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ FEATURES:
 
 IMPROVEMENTS:
 
+- Improve ecs instance and eni docs ([#146](https://github.com/alibaba/ansible-provider/pull/146))
 - Improve module ali_eip and add its testcase ([#145](https://github.com/alibaba/ansible-provider/pull/145))
 - Improve dynamic inventory by setting page_size 100 ([#142](https://github.com/alibaba/ansible-provider/pull/142))
 - Improve ali_security_group and make it idempotence ([#137](https://github.com/alibaba/ansible-provider/pull/137))
diff --git a/lib/ansible/modules/cloud/alicloud/ali_eni_facts.py b/lib/ansible/modules/cloud/alicloud/ali_eni_facts.py
index c413806b..b8729b98 100644
--- a/lib/ansible/modules/cloud/alicloud/ali_eni_facts.py
+++ b/lib/ansible/modules/cloud/alicloud/ali_eni_facts.py
@@ -80,9 +80,9 @@
 
 # Gather facts based on vpc and name_prefix
 - ali_eni_facts:
-    tags:
-      name: Example
-      env: dev
+    name_prefix: foo
+    filters:
+      vswitch_id: vpc-dsfh2ef2
 '''
 
 RETURN = '''
diff --git a/lib/ansible/modules/cloud/alicloud/ali_instance.py b/lib/ansible/modules/cloud/alicloud/ali_instance.py
index c6cba85b..ad3b7504 100644
--- a/lib/ansible/modules/cloud/alicloud/ali_instance.py
+++ b/lib/ansible/modules/cloud/alicloud/ali_instance.py
@@ -382,11 +382,6 @@
             returned: always
             type: string
             sample: m-0011223344
-        inner_ip_address:
-            description: The inner IPv4 address of the classic instance.
-            returned: always
-            type: string
-            sample: 10.0.0.2
         instance_charge_type:
             description: The instance charge type.
             returned: always
@@ -402,6 +397,11 @@
             returned: always
             type: string
             sample: ecs.sn1ne.xlarge
+        instance_type_family:
+            description: The instance type family of the instance belongs.
+            returned: always
+            type: string
+            sample: ecs.sn1ne
         internet_charge_type:
             description: The billing method of the network bandwidth.
             returned: always
@@ -463,7 +463,7 @@
             type: string
             sample: 10.0.0.1
         public_ip_address:
-            description: The public IPv4 address assigned to the instance
+            description: The public IPv4 address assigned to the instance or eip address
             returned: always
             type: string
             sample: 43.0.0.1
diff --git a/lib/ansible/modules/cloud/alicloud/ali_instance_facts.py b/lib/ansible/modules/cloud/alicloud/ali_instance_facts.py
index 1c25cbc4..169467a5 100644
--- a/lib/ansible/modules/cloud/alicloud/ali_instance_facts.py
+++ b/lib/ansible/modules/cloud/alicloud/ali_instance_facts.py
@@ -212,11 +212,6 @@
             returned: always
             type: string
             sample: m-0011223344
-        inner_ip_address:
-            description: The inner IPv4 address of the classic instance.
-            returned: always
-            type: string
-            sample: 10.0.0.2
         instance_charge_type:
             description: The instance charge type.
             returned: always
@@ -227,6 +222,11 @@
             returned: always
             type: string
             sample: my-ecs
+        instance_type_family:
+            description: The instance type family of the instance belongs.
+            returned: always
+            type: string
+            sample: ecs.sn1ne
         instance_type:
             description: The instance type of the running instance.
             returned: always
@@ -293,7 +293,7 @@
             type: string
             sample: 10.0.0.1
         public_ip_address:
-            description: The public IPv4 address assigned to the instance
+            description: The public IPv4 address assigned to the instance or eip address
             returned: always
             type: string
             sample: 43.0.0.1