diff --git a/README.md b/README.md
index cdd3f1e..d7e32e6 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,8 @@ This project is cost a lot of time and effort, if it can help you, please [buy m
 
 1. If you want to use overlay (only available for Windows), pay attention to the settings of the renderer.
 2. About Android exporting: only testing with "EOS Android SDK 1.16.1".
-3. Some Apis in `1.16.1` will lead to crash by the bug of SDK itself:
+3. `XxxAttributeData.Key` will be converted to upper case when transfering to remote peer, you should not use lower charactors in your key.
+4. Some Apis in `1.16.1` will lead to crash by the bug of SDK itself:
    1. `EOSUserInfoInterface.copy_best_display_name()` -> `EOS_UserInfo_CopyBestDisplayName()`
 
 ## Exporting for Android
diff --git a/README.zh.md b/README.zh.md
index 54d08e7..e14f6e3 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -128,7 +128,8 @@
 
 1. 如果你要使用覆层(仅Windows可用)，要注意渲染器的设置。
 2. 关于安卓导出: 目前仅使用 "EOS Android SDK 1.16.1" 测试通过，如果要进行安卓导出，注意下载的SDK版本应该对应。
-3. 某些`1.16.1`版本的接口会由于SDK本身的bug导致程序奔溃:
+3. `XxxAttributeData` 的 `Key` 字段传输到远端时会被转为大写，因此你不应该使用小写字符作为键。
+4. 某些`1.16.1`版本的接口会由于SDK本身的bug导致程序奔溃:
    1. `EOSUserInfoInterface.copy_best_display_name()` -> `EOS_UserInfo_CopyBestDisplayName()`
 
 ## 安卓导出
diff --git a/demo/scenes/main/main.gd b/demo/scenes/main/main.gd
index e22b448..b7e6694 100644
--- a/demo/scenes/main/main.gd
+++ b/demo/scenes/main/main.gd
@@ -188,7 +188,7 @@ func _create_lobby_async() -> void:
 
 	_entered_lobby_id = create_result.lobby_id
 
-	# Initialize lobby info, we use "started" to sreach lobbies.
+	# Initialize lobby info, we use "STARTE" to sreach lobbies.
 	var ulmr := EOSLobby.update_lobby_modification(_product_user_id, _entered_lobby_id)
 	if ulmr.result_code != EOS.Success:
 		printerr("== Update lobby modification failed: ", EOS.result_to_string(ulmr.result_code))
@@ -197,7 +197,7 @@ func _create_lobby_async() -> void:
 	var lobby_modification := ulmr.lobby_modification
 
 	var parameter := EOSLobby_AttributeData.new()
-	parameter.key = "started"
+	parameter.key = "STARTE"
 	parameter.value = false
 	var add_attribute_result = lobby_modification.add_attribute(parameter, EOSLobby.LAT_PUBLIC)
 	if add_attribute_result != EOS.Success:
@@ -224,7 +224,7 @@ func _refresh_lobbies_list_async() -> void:
 	var lobby_search: EOSLobbySearch = clsr.lobby_search
 	# Ignore strated lobbies.
 	var parameter := EOSLobby_AttributeData.new()
-	parameter.key = "started"
+	parameter.key = "STARTE"
 	parameter.value = false
 	lobby_search.set_parameter(parameter, EOS.CO_EQUAL)