diff --git a/LICENSE b/LICENSE
index 2071b23..d03b668 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) <year> <copyright holders>
+Copyright (c) <2023> <Ghink Universe Technology Inc.>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
diff --git a/README.md b/README.md
index 2eef512..323417f 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,15 @@
 # AliDDNS
 
-DDNS Plugin with Aliyun
\ No newline at end of file
+DDNS Plugin with Aliyun
+
+## Installation
+
+Install all requirments with follow command:
+
+`pip install -r requirements.txt`
+
+## Running
+
+1. Configure class in `main.py`, write down your credential and domain.
+2. Keep this script running on your machine, like running through `systemctl`.
+3. Enjoy :)
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diff --git a/main.py b/main.py
new file mode 100644
index 0000000..79f92ad
--- /dev/null
+++ b/main.py
@@ -0,0 +1,126 @@
+import time
+import threading
+import json
+
+import requests
+
+from aliyunsdkcore.client import AcsClient
+from aliyunsdkalidns.request.v20150109.DescribeDomainRecordsRequest import DescribeDomainRecordsRequest
+from aliyunsdkalidns.request.v20150109.UpdateDomainRecordRequest import UpdateDomainRecordRequest
+
+class AliDDNS(object):
+    def __init__(self,
+                 domain, record, 
+                 id, secret,
+                 sleep = 600,
+                 ipv4 = True, ipv6 = True,
+                 v4api = "https://ipv4.gh.ink",
+                 v6api = "https://ipv6.gh.ink"):
+    
+        assert domain.count(".") == 1 and \
+               not domain.startswith(".") and \
+               not domain.endswith(".")
+
+        self.domain = domain
+        self.record = record
+        self.sleep = sleep
+        self.ipv4 = ipv4
+        self.ipv6 = ipv6
+        self.v4api = v4api
+        self.v6api = v6api
+
+        self.__client = AcsClient(id, secret, 'cn-hangzhou')
+
+        daemon = threading.Thread(target=self.__daemon, name="Daemon Thread")
+        daemon.daemon = True
+        daemon.start()
+
+    def __daemon(self):
+        while True:
+            self.refresh()
+            time.sleep(self.sleep)
+
+    def refresh(self):
+        # Get local public ipv4 address
+        if self.ipv4:
+            try:
+                self.__v4 = requests.get(self.v4api).text
+            except Exception as e: 
+                print("Failed to get local public ipv4 address,", e)
+            else:
+                print("Your ipv4 address is:", self.__v4)
+
+                describe_v4 = DescribeDomainRecordsRequest()
+                describe_v4.set_accept_format('json')
+
+                describe_v4.set_DomainName(self.domain)
+                describe_v4.set_RRKeyWord(self.record)
+                describe_v4.set_TypeKeyWord("A")
+
+                describeback_v4 = self.__client.do_action_with_exception(describe_v4)
+
+                recordlist_v4 = json.loads(describeback_v4)
+                recordid_v4 = recordlist_v4['DomainRecords']['Record'][0]['RecordId']
+                value_v4 = recordlist_v4['DomainRecords']['Record'][0]['Value']
+
+                if value_v4 != self.__v4:
+                    print('Your ipv4 address has been changed, update now.')
+                    update_v4 = UpdateDomainRecordRequest()
+                    update_v4.set_accept_format('json')
+
+                    update_v4.set_RecordId(recordid_v4)
+                    update_v4.set_Value(self.__v4)
+                    update_v4.set_Type("A")
+                    update_v4.set_RR(self.record)
+
+                    self.__client.do_action_with_exception(update_v4)
+                    print('Your ipv4 record has been updated successfully.')
+
+        
+        # Get local public ipv6 address
+        if self.ipv6:
+            try:
+                self.__v6 = requests.get(self.v6api).text
+            except Exception as e: 
+                print("Failed to get local public ipv4 address,", e)
+            else:
+                print("Your ipv6 address is:", self.__v6)
+
+                describe_v6 = DescribeDomainRecordsRequest()
+                describe_v6.set_accept_format('json')
+
+                describe_v6.set_DomainName(self.domain)
+                describe_v6.set_RRKeyWord(self.record)
+                describe_v6.set_TypeKeyWord("AAAA")
+
+                describeback_v6 = self.__client.do_action_with_exception(describe_v6)
+
+                recordlist_v6 = json.loads(describeback_v6)
+                recordid_v6 = recordlist_v6['DomainRecords']['Record'][0]['RecordId']
+                value_v6 = recordlist_v6['DomainRecords']['Record'][0]['Value']
+
+                if value_v6 != self.__v6:
+                    print('Your ipv6 address has been changed, update now.')
+                    update_v6 = UpdateDomainRecordRequest()
+                    update_v6.set_accept_format('json')
+
+                    update_v6.set_RecordId(recordid_v6)
+                    update_v6.set_Value(self.__v6)
+                    update_v6.set_Type("AAAA")
+                    update_v6.set_RR(self.record)
+
+                    self.__client.do_action_with_exception(update_v6)
+                    print('Your ipv6 record has been updated successfully.')
+            
+if __name__ == "__main__":
+    dns = AliDDNS("MainDomain.com", "SubDomain", "AccessKey ID", "AccessKey Secret")
+    
+    while True:
+        cmd = input()
+        if cmd == "exit":
+            break
+        elif cmd == "refresh":
+            dns.refresh()
+        else:
+            print("Unknown command.")
+        
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diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..4520582
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+requests==2.26.0
+aliyun-python-sdk-core==2.13.36
+aliyun-python-sdk-alidns==3.0.1
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