diff --git a/main.py b/main.py
index a735265..1c4b882 100644
--- a/main.py
+++ b/main.py
@@ -3,11 +3,6 @@ import sys
 from src.parser import get_args
 from src.node_manager import NodeManager
 
-actions = [
-        {'explanation': 'Add another node into our cluster', 'function': 'add_node'},
-        {'explanation': 'Exit', 'function': 'exit'},
-    ]
-
 if __name__ == '__main__':
     args = get_args()
     host, port = args.host, args.port
@@ -19,7 +14,7 @@ if __name__ == '__main__':
     is_run = True
     while is_run:
         explanation = '=' * 30 + '\n'
-        for index, action in enumerate(actions):
+        for index, action in enumerate(manager.actions):
             explanation += f'{index+1}) {action["explanation"]}\n'
         explanation += '=' * 30
         explanation += '\n> '
@@ -34,7 +29,7 @@ if __name__ == '__main__':
             if read_list:
                 action = sys.stdin.readline()
                 try:
-                    action = actions[int(action)-1]
+                    action = manager.actions[int(action)-1]
                     if action['function'] == 'exit':
                         manager.exit()
                         is_run = False
diff --git a/src/communication.py b/src/communication.py
index a169f2e..3f136aa 100644
--- a/src/communication.py
+++ b/src/communication.py
@@ -1,4 +1,6 @@
 import socket
+import json
+from variables import actions
 
 class ClusterCommunicationModule():
     def __init__(self, host, port, node_manager):
@@ -10,7 +12,7 @@ class ClusterCommunicationModule():
         self.client_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         self.host = host
         self.port = port
-
+        self.IP = socket.gethostbyname(socket.gethostname())
 
         self.node_manager = node_manager
         self.worker_conns = []
@@ -40,10 +42,8 @@ class ClusterCommunicationModule():
                             break
             elif data == '[CHECK]':             # master side
                 self.worker_conns.append(conn)
-                conn.send('TEST'.encode())
                 continue
 
-
             conn.close()
 
     def process_request(self, conn, addr):      # worker side
@@ -53,6 +53,9 @@ class ClusterCommunicationModule():
             self.client_sock.connect((addr[0], self.port))
             self.client_sock.send('[CHECK]'.encode())
 
+            # remove 'add node'
+            self.node_manager.actions = self.node_manager.actions[1:]
+
             self.node_manager.status = 'worker'
             print(f'You are in {addr} cluster now.\nPlease type in Enter to continue')
             return True
@@ -62,6 +65,11 @@ class ClusterCommunicationModule():
             return False
 
     def handle_command(self, data):
+        command, args = data.split()
+        if command == '[INFO]':
+            data = {'host': self.IP, 'GPU': self.node_manager.GPU, 'GPU_num': self.node_manager.GPU_num}
+            self.client_sock.send(json.dumps(data).encode())
+            
         return True
 
     def request(self, host):                    # master side
@@ -76,9 +84,24 @@ class ClusterCommunicationModule():
 
         if data == '[REJECT]':
             print(f"{host} reject.")
+            return False
         elif data == '[ACCEPT]':
             self.node_manager.status = 'master'
+
             print(f"{host} accept.")
+            return True
+    
+    def cluster_info(self):
+        ans = []
+        for conn in self.worker_conns:
+            try:
+                conn.send('[INFO] {}'.encode())
+                data = conn.recv(1024)
+                data = json.loads(data.decode())
+                ans.append(data)
+            except:
+                self.worker_conns.remove(conn)
+        return ans
 
     def exit(self):
         self.sock.close()
diff --git a/src/node_manager.py b/src/node_manager.py
index 4669658..1421f9c 100644
--- a/src/node_manager.py
+++ b/src/node_manager.py
@@ -2,9 +2,16 @@ import threading
 from src.communication import ServiceExplorationModule, ClusterCommunicationModule
 import time
 
+
 class NodeManager():
     def __init__(self, host, port):
         self.status = 'none'
+        self.actions = [
+            {'explanation': 'Add another node into our cluster', 'function': 'add_node'},
+            {'explanation': 'Exit', 'function': 'exit'},
+        ]
+        self.GPU = 'RTX 4090'
+        self.GPU_num = 1
 
         # start Cluster Communication Module
         # let the nodes in the cluster can communicate
@@ -33,15 +40,28 @@ class NodeManager():
             msg += '\n> '
 
             choose = input(msg)
-            # try:
-            choose = int(choose)-1
-            print("START REQUEST")
-            self.cluster_communication_module.request(hosts[choose])
-            print(f"Link to {hosts[choose]}")
-            # except:
-                # print("=== FAIL ===")
+            try:
+                choose = int(choose)-1
+                accept = self.cluster_communication_module.request(hosts[choose])
+                if accept:
+                    exit_func = self.actions[-1]
+                    self.actions = self.actions[:-1]
+                    info_func = {'explanation': 'cluster info', 'function': 'cluster_info'}
+                    if info_func not in self.actions:
+                        self.actions.append(info_func)
+                    self.actions.append(exit_func)
+            except:
+                print("=== FAIL ===")
         else:
             print("No other nodes in your subnet.")
+
+    def cluster_info(self):
+        info = self.cluster_communication_module.cluster_info()
+        print(f"\nThere are {len(info)+1} nodes in this cluster.")
+        print("Cluster Info:")
+        print(f"    {self.service_exploration_module.IP}(local) -> {self.GPU} * {self.GPU_num}")
+        for host in info:
+            print(f"    {host['host']} -> {host['GPU']} * {host['GPU_num']}")
     
     def exit(self):
         self.cluster_communication_module.exit()