modify

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_android.md

@@ -35,17 +35,19 @@ This section shows how to implement sending and receiving the various types of m
 Use the `ChatMessage` class to create a text message, and send the message. 
 
 ```java
-// Call createTextSendMessage to create a text message. Set content as the content of the text message, and conversationId the user ID of the message recipient.
+// Call createTextSendMessage to create a text message. 
+// Set `content` as the content of the text message.
+// Set `conversationId` to the user ID of the peer user in one-to-one chat, group ID in group chat, and chat room ID in room chat.
 ChatMessage message = ChatMessage.createTextSendMessage(content, conversationId); 
-// Set the message type using the MessageType attribute in Message.
-// You can set `MessageType` as `Chat`, `Group`, or `Room`, which indicates whether to send the message to a peer user, a chat group, or a chat room.  
+// Set `ChatType` as `Chat`, `GroupChat`, or `ChatRoom` for one-to-one chat, group chat, or room chat.  
 message.setChatType(ChatMessage.ChatType.GroupChat); 
- // Send the message 
+ // Send the message. 
  ChatClient.getInstance().chatManager().sendMessage(message);
 ```
 
 ```java
-// Calls setMessageStatusCallback to set the callback instance to get the status of messaging sending. You can update the status of messages in this callback, for example, adding a tip when the message sending fails.
+// Call setMessageStatusCallback to set the callback instance to get the status of messaging sending. 
+// You can update the status of messages in this callback, for example, adding a tip when the message sending fails.
  message.setMessageStatusCallback(new CallBack() {
      @Override
      public void onSuccess() {
@@ -74,7 +76,7 @@ sendMessage(message);
 
 You can use `MessageListener` to listen for message events. You can add multiple `MessageListener`s to listen for multiple events. When you no longer listen for an event, ensure that you remove the listener.
 
-When a message arrives, the recipient receives an `onMessgesReceived` callback. Each callback contains one or more messages. You can traverse the message list, and parse and render these messages in this callback.
+When a message arrives, the recipient receives an `onMessagesReceived` callback. Each callback contains one or more messages. You can traverse the message list, and parse and render these messages in this callback.
 
 ```java
 MessageListener msgListener = new MessageListener() {

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_flutter.md

@@ -39,11 +39,11 @@ Follow the steps to create and send a message, and listen for the result of send
 ```dart
 // Sets the message type. Agora Chat supports 8 message types.
 MessageType messageType = MessageType.TXT;
-// Sets the user ID of the recipient.
+// Sets `targetId` to the user ID of the peer user in one-to-one chat, group ID in group chat, and chat room ID in room chat.
 String targetId = "tom";
-// Sets the chat type. You can set it as a peer user, chat group, or chat room.
+// Sets `chatType` as `Chat`, `GroupChat`, or `ChatRoom` for one-to-one chat, group chat, or room chat.
 ChatType chatType = ChatType.Chat;
-// Creates a message. For different message types, you need to set different parameters.
+// Creates a message. Parameters vary with message types.
 // Creates a text message.
 ChatMessage msg = ChatMessage.createTxtSendMessage(
     targetId: targetId,

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_ios.md

@@ -35,19 +35,20 @@ This section shows how to implement sending and receiving the various types of m
 Use the `AgoraChatTextMessageBody` class to create a text message, and then send the message.
 
 ```objective-c
-// Call initWithText to create a text message. Set content as the text content and toChatUsername to the username to whom you want to send this text message.
-AgoraChatTextMessageBody *textMessageBody = [[AgoraChatTextMessageBody alloc] initWithText:content];
-AgoraChatMessage *message = [[AgoraChatMessage alloc] initWithConversationID:toChatUsername
-                                                      from:fromChatUsername
-                                                        to:toChatUsername
-                                                      body:textMessageBody
-                                                       ext:messageExt];
-// Set the chat type as Group chat. You can also set is as chat (one-to-one chat) or chat room.
-// message.chatType = AgoraChatTypeGroupChat;
-// Sends the message
-[[AgoraChatClient sharedClient].chatManager sendMessage:message
-                                               progress:nil
-                                             completion:nil];
+// Call initWithText to create a text message. Set `content` to the text content.
+    AgoraChatTextMessageBody *textMessageBody = [[AgoraChatTextMessageBody alloc] initWithText:content];
+    // Set `conversationId` to the user ID of the peer user in one-to-one chat, group ID in group chat, and chat room ID in room chat.
+    NSString* conversationId = @"remoteUserId";
+    AgoraChatMessage *message = [[AgoraChatMessage alloc] initWithConversationID:conversationId
+                                                          body:textMessageBody
+                                                           ext:messageExt];
+    // Set `message.chatType` to `AgoraChatTypeChat` for one-to-one chat, `AgoraChatTypeGroupChat` for group chat, and `AgoraChatTypeChatRoom` for room chat.
+    // The default value is `AgoraChatTypeChat`.
+    message.chatType = AgoraChatTypeChat;
+    // Send the message.
+    [[AgoraChatClient sharedClient].chatManager sendMessage:message
+                                                   progress:nil
+                                                 completion:nil];
 ```
 
 You can set the priority of chat room messages. 

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_rn.md

@@ -64,27 +64,27 @@ class ChatMessageCallback implements ChatMessageStatusCallback {
   .catch((reason) => {
   // The sending operation fails and the log is printed here.
   console.log("send message operation fail.", reason);
-  });
+  })
+  };
 ```
 
 Use the `ChatMessage` class to create a message, and `ChannelManager` to send the message. 
 
 ```typescript
-// Set the message type. The SDK supports 8 message types. For details, see descriptions in ChatMessageType.
-// You can send different types of messages by setting this parameter.
+// Set the message type. The SDK supports 8 message types. 
 const messageType = ChatMessageType.TXT;
-// Set the user ID of the message recipient.
+// Set `targetId` to the user ID of the peer user in one-to-one chat, group ID in group chat, and chat room ID in room chat.
 const targetId = "tom";
-// Set the chat type as a peer-to-peer chat, group chat, or chat room. For details, see descriptions in ChatMessageChatType.
+// Set `chatType` as `PeerChat`, `GroupChat`, or `ChatRoom` for one-to-one chat, group chat, or room chat.
 const chatType = ChatMessageChatType.PeerChat;
-// Construct the message. For different message types, you need to set the different parameters.
+// Construct the message. Parameters vary with message types.
 let msg: ChatMessage;
 if (messageType === ChatMessageType.TXT) {
   // For a text message, set the message content.
   const content = "This is text message";
   msg = ChatMessage.createTextMessage(targetId, content, chatType);
 } else if (messageType === ChatMessageType.IMAGE) {
-  // For am image message, set the file path, width, height, and display name of the image file.
+  // For an image message, set the file path, width, height, and display name of the image file.
   const filePath = "/data/.../image.jpg";
   const width = 100;
   const height = 100;

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_unity.md

@@ -35,16 +35,20 @@ This section shows how to implement sending and receiving the various types of m
 Use the `Message` class to create a text message, and `IChannelManager` to send the message. 
 
 ```C#
-// Call CreateTextSendMessage to create a text message. Set `content` as the content of the text message, and `toChatUsernames` the user ID of the message recipient.
-Message msg = Message.CreateTextSendMessage(toChatUsername, content);
-// Set the message type using the `MessageType` attribute in `Message`.
-// You can set `MessageType` as `Chat`, `Group`, or `Room`, which indicates whether to send the message to a peer user, a chat group, or a chat room.  
+// Call CreateTextSendMessage to create a text message. 
+// Set `content` as the content of the text message.
+// Set `conversationId` to the user ID of the peer user in one-to-one chat, group ID in group chat, and chat room ID in room chat.
+Message msg = Message.CreateTextSendMessage(conversationId, content);
+// Set `MessageType` in `Message` as `Chat`, `Group`, or `Room` for one-to-one chat, group chat, or room chat.
 msg.MessageType = MessageType.Group;
+
 // Set the priority of chat room messages. The default priority is `Normal`, indicating the normal priority.
-msg.MessageType = MessageType.Room;
-msg.SetRoomMessagePriority(RoomMessagePriority.High);
+// msg.MessageType = MessageType.Room;
+// msg.SetRoomMessagePriority(RoomMessagePriority.High);
+
 // Call SendMessage to send the message.
-// When sending the message, you can instantiate a `Callback` object to listen for the result of the message sending. You can also update the message state in this callback, for example, by adding a pop-up box that reminds the message sending fails.
+// When sending the message, you can instantiate a `Callback` object to listen for the result of the message sending. 
+// You can also update the message state in this callback, for example, by adding a pop-up box that reminds the message sending fails.
 SDKClient.Instance.ChatManager.SendMessage(ref msg, new CallBack(
   onSuccess: () => {
     Debug.Log($"{msg.MsgId} Message sending succeeds.");
@@ -59,7 +63,7 @@ SDKClient.Instance.ChatManager.SendMessage(ref msg, new CallBack(
 
 You can use `IChatManagerDelegate` to listen for message events. You can add multiple `IChatManagerDelegates` to listen for multiple events. When you no longer listen for an event, ensure that you remove the delegate.
 
-When a message arrives, the recipient receives an `OnMessgesReceived` callback. Each callback contains one or more messages. You can traverse the message list, and parse and render these messages in this callback and render these messages.
+When a message arrives, the recipient receives an `OnMessagesReceived` callback. Each callback contains one or more messages. You can traverse the message list, and parse and render these messages in this callback and render these messages.
 
 ```C#
 // Inherit and instantiate IChatManagerDelegate.

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_web.md

@@ -39,14 +39,14 @@ function sendPrivateText() {
     let option = {
         // Set the message content.
         msg: "message content",
-        // Set the username of the receiver.
-        to: "username",
-        // Set the chat type
+        // Set the user ID of the recipient for one-to-one chat, group ID for group chat, or chat room ID for room chat.
+        to: "userId",
+        // Set `chatType` as `singleChat` for one-to-one chat, `groupChat` for group chat, or `chatRoom` for room chat.
         chatType: "singleChat",
     };
     // Create a text message.
     let msg = AC.message.create(option);
-    // Call send to send the message
+    // Call `send` to send the message
      conn.send(msg).then((res)=>{
       console.log("Send message success",res);
     }).catch((e)=>{

en-US/markdown/agora-chat/Develop/Messages/Send and Receive Messages/agora_chat_send_receive_message_windows.md

@@ -35,16 +35,20 @@ This section shows how to implement sending and receiving the various types of m
 Use the `Message` class to create a text message, and `IChannelManager` to send the message. 
 
 ```C#
-// Call CreateTextSendMessage to create a text message. Set `content` as the content of the text message, and `toChatUsernames` the user ID of the message recipient.
-Message msg = Message.CreateTextSendMessage(toChatUsername, content);
-// Set the message type using the `MessageType` attribute in `Message`.
-// You can set `MessageType` as `Chat`, `Group`, or `Room`, which indicates whether to send the message to a peer user, a chat group, or a chat room.  
+// Call CreateTextSendMessage to create a text message. 
+// Set `content` as the content of the text message.
+// Set `conversationId` to the user ID of the peer user in one-to-one chat, group ID in group chat, and chat room ID in room chat.
+Message msg = Message.CreateTextSendMessage(conversationId, content);
+// Set `MessageType` in `Message` as `Chat`, `Group`, or `Room` for one-to-one chat, group chat, or room chat.
 msg.MessageType = MessageType.Group;
-//Set the priority of chat room messages. The default priority is `Normal`, indicating the normal priority.
-msg.MessageType = MessageType.Room;
-msg.SetRoomMessagePriority(RoomMessagePriority.High);
+
+// Set the priority of chat room messages. The default priority is `Normal`, indicating the normal priority.
+// msg.MessageType = MessageType.Room;
+// msg.SetRoomMessagePriority(RoomMessagePriority.High);
+
 // Call SendMessage to send the message.
-// When sending the message, you can instantiate a `Callback` object to listen for the result of the message sending. You can also update the message state in this callback, for example, by adding a pop-up box that reminds the message sending fails.
+// When sending the message, you can instantiate a `Callback` object to listen for the result of the message sending. 
+// You can also update the message state in this callback, for example, by adding a pop-up box that reminds the message sending fails.
 SDKClient.Instance.ChatManager.SendMessage(ref msg, new CallBack(
   onSuccess: () => {
     Debug.Log($"{msg.MsgId} Message sending succeeds.");
@@ -59,7 +63,7 @@ SDKClient.Instance.ChatManager.SendMessage(ref msg, new CallBack(
 
 You can use `IChatManagerDelegate` to listen for message events. You can add multiple `IChatManagerDelegates` to listen for multiple events. When you no longer listen for an event, ensure that you remove the delegate.
 
-When a message arrives, the recipient receives an `OnMessgesReceived` callback. Each callback contains one or more messages. You can traverse the message list, and parse and render these messages in this callback and render these messages.
+When a message arrives, the recipient receives an `OnMessagesReceived` callback. Each callback contains one or more messages. You can traverse the message list, and parse and render these messages in this callback and render these messages.
 
 ```C#
 // Inherit and instantiate IChatManagerDelegate.