diff --git a/Messages.py b/Messages.py
index 5f7f934..4aff96f 100644
--- a/Messages.py
+++ b/Messages.py
@@ -30,60 +30,6 @@ class InvestigateMsg():
         self.network_id = buffer[1]
         self.thing_id = buffer[2]
 
-class ThingMsg(IMessage):
-    id = 0x80
-    length = 5
-
-    def __init__(self, network_id, thing):
-        self.network_id = network_id
-        self.thing = thing
-
-    def Serialize(self, buffer_ref):
-        if self.network_id is None or self.thing is None:
-            return 0
-        
-        buffer: bytearray = buffer_ref[0]
-        buffer[0:ThingMsg.length] = [
-            ThingMsg.id,
-            self.network_id,
-            self.thing.id,
-            self.thing.type,
-            self.thing.parent_id
-        ]
-        return ThingMsg.length
-
-class ModelUrlMsg(IMessage):
-    id = 0x90
-    length = 6
-    
-    def __init__(self, network_id, thing):
-        self.network_id = network_id
-        self.thing = thing
-    
-    def Serialize(self, buffer_ref):
-        if self.network_id is None or self.thing is None or self.thing.model_url is None:
-            return 0
-        
-        buffer: bytearray = buffer_ref[0]
-
-        encoded_url = self.thing.model_url.encode('utf-8')
-        url_length = len(encoded_url)
-        full_length = ModelUrlMsg.length + url_length
-        if url_length == 0 or full_length > len(buffer):
-            return 0
-
-        buffer[0:ModelUrlMsg.length] = [
-            ModelUrlMsg.id,
-            self.network_id,
-            self.thing.id,
-            0x3D, # Dummy float16 value 1
-            0x00, # this field will disappear
-            url_length
-        ]
-        # Append the url string
-        buffer[ModelUrlMsg.length:full_length] = encoded_url
-        return full_length
-    
 class PoseMsg(IMessage):
     id = 0x10
     length = 4
diff --git a/ModelUrlMsg.py b/ModelUrlMsg.py
new file mode 100644
index 0000000..863c1a2
--- /dev/null
+++ b/ModelUrlMsg.py
@@ -0,0 +1,43 @@
+from Messages import IMessage
+
+class ModelUrlMsg(IMessage):
+    id = 0x90
+    length = 4
+    
+    def __init__(self, data, thing = None):
+        if isinstance(data, bytes):
+            self.network_id = data[1]
+            self.thing_id = data[2]
+            # model url length is not needed here
+            self.url = data[ModelUrlMsg.length:].decode("utf-8")
+        else:
+            self.network_id = data
+            if thing is not None:
+                self.thing_id = thing.id
+                self.url = thing.model_url
+            else:
+                self.thing_id = None
+                self.url = None
+    
+    def Serialize(self, buffer_ref):
+        if self.network_id is None or self.thing_id is None or self.url is None:
+            return 0
+        
+        buffer: bytearray = buffer_ref[0]
+
+        encoded_url = self.url.encode('utf-8')
+        url_length = len(encoded_url)
+        full_length = ModelUrlMsg.length + url_length
+        if url_length == 0 or full_length > len(buffer):
+            return 0
+
+        buffer[0:ModelUrlMsg.length] = [
+            ModelUrlMsg.id,
+            self.network_id,
+            self.thing_id,
+            url_length
+        ]
+        # Append the url string
+        buffer[ModelUrlMsg.length:full_length] = encoded_url
+        return full_length
+    
diff --git a/NameMsg.py b/NameMsg.py
index 3b08006..b799196 100644
--- a/NameMsg.py
+++ b/NameMsg.py
@@ -4,23 +4,28 @@ class NameMsg(IMessage):
     id = 0x91
     length = 4
 
-    def __init__(self, network_id, thing=None):
-        if isinstance(network_id, bytes):
-            self.network_id = network_id[1]
-            self.thing_id = network_id[2]
-            name_length = network_id[3]
-            self.name = network_id[NameMsg.length:].decode("utf-8")
+    def __init__(self, data, thing = None):
+        if isinstance(data, bytes):
+            self.network_id = data[1]
+            self.thing_id = data[2]
+            # name_length is not needed here
+            self.name = data[NameMsg.length:].decode("utf-8")
         else:
-            self.network_id = network_id
-            self.thing = thing
+            self.network_id = data
+            if thing is not None:
+                self.thing_id = thing.id
+                self.name = thing.name
+            else:
+                self.thing_id = None
+                self.name = None
 
     def Serialize(self, buffer_ref):
-        if self.network_id is None or self.thing is None or self.thing.name is None:
+        if self.network_id is None or self.thing_id is None or self.name is None:
             return 0
 
         buffer: bytearray = buffer_ref[0]
 
-        encoded_name = self.thing.name.encode('utf-8')
+        encoded_name = self.name.encode('utf-8')
         name_length = len(encoded_name)
         full_length = NameMsg.length + name_length
         if name_length == 0 or full_length > len(buffer):
@@ -29,7 +34,7 @@ class NameMsg(IMessage):
         buffer[0:NameMsg.length] = [
             NameMsg.id,
             self.network_id,
-            self.thing.id,
+            self.thing_id,
             name_length
         ]
         # Append the name string
diff --git a/Participant.py b/Participant.py
index d4eb7c2..b0f4cf5 100644
--- a/Participant.py
+++ b/Participant.py
@@ -3,7 +3,9 @@ import threading
 
 from ClientMsg import ClientMsg
 from NetworkIdMsg import NetworkIdMsg
+from ThingMsg import ThingMsg
 from NameMsg import NameMsg
+from ModelUrlMsg import ModelUrlMsg
 from Thing import Thing
 
 ## A participant is device which can communicate with other participants
@@ -43,6 +45,21 @@ class Participant:
         self.others.append(remote_participant)
         return remote_participant
 
+    def Update(self, currentTime):
+        if (currentTime > self.nextPublishMe):
+            self.Publish(ClientMsg(self.network_id))
+            print(f'Sent ClientMsg {self.network_id}')
+            self.nextPublishMe = currentTime + Participant.publishInterval
+
+        Thing.UpdateAll(currentTime)
+
+#region Send
+
+    def SendThingInfo(self, thing):
+        self.Send(ThingMsg(self.network_id, thing))
+        self.Send(NameMsg(self.network_id, thing))
+        self.Send(ModelUrlMsg(self.network_id, thing))
+
     def Send(self, msg):
         buffer_size = msg.Serialize([self.buffer])
         if buffer_size <= 0:
@@ -59,33 +76,10 @@ class Participant:
         
         self.udp_socket.sendto(self.buffer[:buffer_size], ('<broadcast>', self.port))
         return True
-        
-    def Update(self, currentTime):
-        if (currentTime > self.nextPublishMe):
-            self.Publish(ClientMsg(self.network_id))
-            print(f'Sent ClientMsg')
-            self.nextPublishMe = currentTime + Participant.publishInterval
 
-        Thing.UpdateAll(currentTime)
+#endregion       
 
-    def ProcessClientMsg(self, msg: ClientMsg):
-        if msg.network_id == 0:
-            self.Send(NetworkIdMsg(self.network_id))
-            print(f'############################ New Client -> {self.network_id}')
-        else:
-            print(f'############################ New Client')
-
-    def ProcessNetworkIdMsg(self, msg: NetworkIdMsg):
-        self.network_id = msg.network_id
-        print(f'receive network id {msg.network_id}')
-        for thing in Thing.allThings:
-            self.Send(NameMsg(self.network_id, thing))
-
-    def ProcessInvestigateMsg(self, data: bytearray):
-        pass
-
-    def ProcessNameMsg(self, msg: NameMsg):
-        print(f'received name {msg.name}')
+#region Receive
     
     def Receiver(self):
         while True:
@@ -106,11 +100,43 @@ class Participant:
                 self.ProcessClientMsg(ClientMsg(data))
             case NetworkIdMsg.id:
                 self.ProcessNetworkIdMsg(NetworkIdMsg(data))
+            # case InvestigateMsg.id:
+            #     self.ProcessInvestigateMsg(InvestigateMsg(data))
+            case ThingMsg.id:
+                self.ProcessThingMsg(ThingMsg(data))
             case NameMsg.id:
                 self.ProcessNameMsg(NameMsg(data))
-            # case Messages.InvestigateMsg.id:
-            #     msg = Messages.InvestigateMsg(data)
-            #     self.ProcessInvestigateMsg(msg)
+            case ModelUrlMsg.id:
+                self.ProcessModelUrlMsg(ModelUrlMsg(data))
             # case Messages.BinaryMsg.id:
             #     msg = Messages.BinaryMsg(data)
             #     msg.thing.ProcessBinary(msg.data)
+
+    def ProcessClientMsg(self, msg: ClientMsg):
+        if msg.network_id == 0:
+            self.Send(NetworkIdMsg(self.network_id))
+            print(f'############################ New Client -> {self.network_id}')
+        else:
+            print(f'############################ Client')
+
+    def ProcessNetworkIdMsg(self, msg: NetworkIdMsg):
+        if self.network_id != msg.network_id:
+            self.network_id = msg.network_id
+            print(f'receive network id {msg.network_id}')
+            for thing in Thing.allThings:
+                self.SendThingInfo(thing)
+                # self.Send(NameMsg(self.network_id, thing))
+
+    def ProcessInvestigateMsg(self, data: bytearray):
+        pass
+
+    def ProcessThingMsg(self, msg: ThingMsg):
+        print(f'received thing {msg.thing_id}')
+
+    def ProcessNameMsg(self, msg: NameMsg):
+        print(f'received name {msg.name}')
+    
+    def ProcessModelUrlMsg(self, msg: ModelUrlMsg):
+        print(f'received model url: {msg.url}')
+
+#endregion
\ No newline at end of file
diff --git a/ThingMsg.py b/ThingMsg.py
new file mode 100644
index 0000000..8c0ddcf
--- /dev/null
+++ b/ThingMsg.py
@@ -0,0 +1,36 @@
+from Messages import IMessage
+
+class ThingMsg(IMessage):
+    id = 0x80
+    length = 5
+
+    def __init__(self, data, thing=None):
+        if isinstance(data, bytes):
+            self.network_id = data[1]
+            self.thing_id = data[2]
+            self.thing_type = data[3]
+            self.parent_id = data[4]
+        else:
+            self.network_id = data
+            if thing is not None:
+                self.thing_id = thing.id
+                self.thing_type = thing.type
+                self.parent_id = thing.parent_id
+            else:
+                self.thing_id = None
+                self.thing_type = None
+                self.parent_id = None
+
+    def Serialize(self, buffer_ref):
+        if self.network_id is None or self.thing_id is None:
+            return 0
+        
+        buffer: bytearray = buffer_ref[0]
+        buffer[0:ThingMsg.length] = [
+            ThingMsg.id,
+            self.network_id,
+            self.thing_id,
+            self.thing_type,
+            self.parent_id
+        ]
+        return ThingMsg.length
\ No newline at end of file
diff --git a/test/__pycache__/thing_test.cpython-312.pyc b/test/__pycache__/thing_test.cpython-312.pyc
index 529efc2..98a11fc 100644
Binary files a/test/__pycache__/thing_test.cpython-312.pyc and b/test/__pycache__/thing_test.cpython-312.pyc differ
diff --git a/test/thing_test.py b/test/thing_test.py
index 77feae2..ba5efc3 100644
--- a/test/thing_test.py
+++ b/test/thing_test.py
@@ -22,27 +22,13 @@ class ThingTest(unittest.TestCase):
         participant = Participant("127.0.0.1")
         thing = Thing()
         thing.name = "First thing"
+        thing.model_url = "https://passer.life/extras/ant.jpg"
 
         milliseconds = time.time() * 1000
         start_time = milliseconds
-        while milliseconds < start_time + 5000:
+        while milliseconds < start_time + 6000:
             milliseconds = time.time() * 1000
             participant.Update(milliseconds)
 
-    def test_something(self):
-        self.assertEqual(1 + 1, 2)
-
-    def test_another_thing(self):
-        self.assertTrue(isinstance("hello", str))
-
-    def test_yet_another_thing(self):
-        self.assertFalse(3 > 5)
-
-    def test_more_tests(self):
-        self.assertIn(3, [1, 2, 3, 4])
-
-    def test_even_more_tests(self):
-        self.assertIsNone(None)
-
 if __name__ == '__main__':
     unittest.main()
\ No newline at end of file