diff --git a/src/Program.cs b/src/Program.cs
index 3ba77fa..53d5b49 100644
--- a/src/Program.cs
+++ b/src/Program.cs
@@ -23,119 +23,113 @@
 }));
 botClient.StartReceiving(async (_, update, _) =>
 {
-    try
+    switch (update.Type)
     {
-        switch (update.Type)
-        {
-            case UpdateType.CallbackQuery:
+        case UpdateType.CallbackQuery:
+            {
+                Internationalization lang = (config.EnableAutoI18n && !string.IsNullOrEmpty(update.CallbackQuery.From.LanguageCode)) ? i18nHelper.TryGetLanguageData(update.CallbackQuery.From.LanguageCode, out Internationalization value) ? value : i18nHelper[CultureInfo.CurrentCulture.Name] : i18nHelper[CultureInfo.CurrentCulture.Name];
+                if (!groupData.TryGetValue(update.CallbackQuery.Message.Chat.Id, out Dictionary<int, long> data)
+                     || !data.TryGetValue(update.CallbackQuery.Message.MessageId, out long userId)
+                     || userId != update.CallbackQuery.From.Id)
                 {
-                    Internationalization lang = (config.EnableAutoI18n && !string.IsNullOrEmpty(update.CallbackQuery.From.LanguageCode)) ? i18nHelper.TryGetLanguageData(update.CallbackQuery.From.LanguageCode, out Internationalization value) ? value : i18nHelper[CultureInfo.CurrentCulture.Name] : i18nHelper[CultureInfo.CurrentCulture.Name];
-                    if (!groupData.TryGetValue(update.CallbackQuery.Message.Chat.Id, out Dictionary<int, long> data)
-                         || !data.TryGetValue(update.CallbackQuery.Message.MessageId, out long userId)
-                         || userId != update.CallbackQuery.From.Id)
-                    {
-                        await botClient.AnswerCallbackQueryAsync(update.CallbackQuery.Id, lang["Failed"]);
-                        break;
-                    }
-                    try
-                    {
-                        await botClient.ApproveChatJoinRequest(update.CallbackQuery.Message.Chat.Id, data[update.CallbackQuery.Message.MessageId]);
-                    }
-                    catch (ApiRequestException)
-                    {
-                        await botClient.AnswerCallbackQueryAsync(update.CallbackQuery.Id, lang["Failed"]);
-                        break;
-                    }
-                    await botClient.AnswerCallbackQueryAsync(update.CallbackQuery.Id, lang["Pass"]);
+                    await botClient.AnswerCallbackQueryAsync(update.CallbackQuery.Id, lang["Failed"]);
                     break;
                 }
-            case UpdateType.Message:
+                try
                 {
-                    switch (update.Message.Type)
-                    {
-                        case MessageType.Text:
+                    await botClient.ApproveChatJoinRequest(update.CallbackQuery.Message.Chat.Id, data[update.CallbackQuery.Message.MessageId]);
+                }
+                catch (ApiRequestException)
+                {
+                    await botClient.AnswerCallbackQueryAsync(update.CallbackQuery.Id, lang["Failed"]);
+                    break;
+                }
+                await botClient.AnswerCallbackQueryAsync(update.CallbackQuery.Id, lang["Pass"]);
+                break;
+            }
+        case UpdateType.Message:
+            {
+                switch (update.Message.Type)
+                {
+                    case MessageType.Text:
+                        {
+                            Internationalization lang = (config.EnableAutoI18n && !string.IsNullOrEmpty(update.Message.From.LanguageCode)) ? i18nHelper.TryGetLanguageData(update.Message.From.LanguageCode, out Internationalization value) ? value : i18nHelper[CultureInfo.CurrentCulture.Name] : i18nHelper[CultureInfo.CurrentCulture.Name];
+                            if (update.Message.Text != $"/set@{(await botClient.GetMeAsync()).Username}")
                             {
-                                Internationalization lang = (config.EnableAutoI18n && !string.IsNullOrEmpty(update.Message.From.LanguageCode)) ? i18nHelper.TryGetLanguageData(update.Message.From.LanguageCode, out Internationalization value) ? value : i18nHelper[CultureInfo.CurrentCulture.Name] : i18nHelper[CultureInfo.CurrentCulture.Name];
-                                if (update.Message.Text != $"/set@{(await botClient.GetMeAsync()).Username}")
-                                {
-                                    break;
-                                }
-                                if (!(update.Message.Chat.IsForum ?? false) || !(await botClient.GetChatAdministratorsAsync(update.Message.Chat.Id)).Any((chatMember) => chatMember.User.Id == update.Message.From.Id))
+                                break;
+                            }
+                            if (!(update.Message.Chat.IsForum ?? false) || !(await botClient.GetChatAdministratorsAsync(update.Message.Chat.Id)).Any((chatMember) => chatMember.User.Id == update.Message.From.Id))
+                            {
+                                await botClient.SendTextMessageAsync(update.Message.Chat.Id, lang["UpdateFailed"], (update.Message.Chat.IsForum ?? false) ? update.Message.MessageThreadId : default, replyToMessageId: update.Message.MessageId);
+                                break;
+                            }
+                            update.Message.Chat.JoinByRequest = true;
+                            ILiteCollection<ChatData> col = dataBase.GetCollection<ChatData>("chats");
+                            col.Upsert(new ChatData(update.Message.Chat.Id, update.Message.MessageThreadId ?? default));
+                            await botClient.SendTextMessageAsync(update.Message.Chat.Id, lang["UpdateSuccess"], update.Message.MessageThreadId, replyToMessageId: update.Message.MessageId);
+                        }
+                        break;
+                    case MessageType.ChatMembersAdded:
+                        {
+                            foreach (User member in update.Message.NewChatMembers)
+                            {
+                                if (!groupData.TryGetValue(update.Message.Chat.Id, out Dictionary<int, long> data))
                                 {
-                                    await botClient.SendTextMessageAsync(update.Message.Chat.Id, lang["UpdateFailed"], (update.Message.Chat.IsForum ?? false) ? update.Message.MessageThreadId : default, replyToMessageId: update.Message.MessageId);
                                     break;
                                 }
-                                update.Message.Chat.JoinByRequest = true;
-                                ILiteCollection<ChatData> col = dataBase.GetCollection<ChatData>("chats");
-                                col.Upsert(new ChatData(update.Message.Chat.Id, update.Message.MessageThreadId ?? default));
-                                await botClient.SendTextMessageAsync(update.Message.Chat.Id, lang["UpdateSuccess"], update.Message.MessageThreadId, replyToMessageId: update.Message.MessageId);
-                            }
-                            break;
-                        case MessageType.ChatMembersAdded:
-                            {
-                                foreach (User member in update.Message.NewChatMembers)
+                                foreach ((int messageId, long userId) in data)
                                 {
-                                    if (!groupData.TryGetValue(update.Message.Chat.Id, out Dictionary<int, long> data))
+                                    if (userId != member.Id)
                                     {
-                                        break;
-                                    }
-                                    foreach ((int messageId, long userId) in data)
-                                    {
-                                        if (userId != member.Id)
-                                        {
-                                            continue;
-                                        }
-                                        await botClient.DeleteMessageAsync(update.Message.Chat.Id, messageId);
-                                        data.Remove(messageId);
+                                        continue;
                                     }
+                                    await botClient.DeleteMessageAsync(update.Message.Chat.Id, messageId);
+                                    data.Remove(messageId);
                                 }
-                                break;
                             }
-                    }
+                            break;
+                        }
+                }
+                break;
+            }
+        case UpdateType.ChatJoinRequest:
+            {
+                Internationalization lang = (config.EnableAutoI18n && !string.IsNullOrEmpty(update.ChatJoinRequest.From.LanguageCode)) ? i18nHelper.TryGetLanguageData(update.ChatJoinRequest.From.LanguageCode, out Internationalization value) ? value : i18nHelper[CultureInfo.CurrentCulture.Name] : i18nHelper[CultureInfo.CurrentCulture.Name];
+                if (update.ChatJoinRequest.From.IsBot)
+                {
                     break;
                 }
-            case UpdateType.ChatJoinRequest:
+                if (!groupData.ContainsKey(update.ChatJoinRequest.Chat.Id))
                 {
-                    Internationalization lang = (config.EnableAutoI18n && !string.IsNullOrEmpty(update.ChatJoinRequest.From.LanguageCode)) ? i18nHelper.TryGetLanguageData(update.ChatJoinRequest.From.LanguageCode, out Internationalization value) ? value : i18nHelper[CultureInfo.CurrentCulture.Name] : i18nHelper[CultureInfo.CurrentCulture.Name];
-                    if (update.ChatJoinRequest.From.IsBot)
+                    groupData[update.ChatJoinRequest.Chat.Id] = new();
+                }
+                int min = 3;    // TODO：群组管理员自定义时长
+                Message msg = await botClient.SendTextMessageAsync(
+                    update.ChatJoinRequest.Chat.Id,
+                    lang.Translate("Message", $"[{string.IsNullOrWhiteSpace(update.ChatJoinRequest.From.Username) ? update.ChatJoinRequest.From.FirstName + update.ChatJoinRequest.From.LastName : update.ChatJoinRequest.From.Username}](tg://user?id={update.ChatJoinRequest.From.Id})", min),
+                    messageThreadId: (update.ChatJoinRequest.Chat.IsForum ?? false) ? dataBase.GetCollection<ChatData>("chats").FindById(update.ChatJoinRequest.Chat.Id).MessageThreadId : default,
+                    replyMarkup: new InlineKeyboardMarkup(new[]
                     {
-                        break;
-                    }
-                    if (!groupData.ContainsKey(update.ChatJoinRequest.Chat.Id))
+                            InlineKeyboardButton.WithCallbackData(lang["VerifyButton"]),
+                    })
+                );
+                groupData[update.ChatJoinRequest.Chat.Id][msg.MessageId] = update.ChatJoinRequest.UserChatId;
+                Timer timer = new(min * 60000)
+                {
+                    AutoReset = false,
+                };
+                timer.Elapsed += async (_, _) =>
+                {
+                    if (!groupData.TryGetValue(update.ChatJoinRequest.Chat.Id, out Dictionary<int, long> members) || !members.ContainsKey(msg.MessageId))
                     {
-                        groupData[update.ChatJoinRequest.Chat.Id] = new();
+                        return;
                     }
-                    int min = 3;    // TODO：群组管理员自定义时长
-                    Message msg = await botClient.SendTextMessageAsync(
-                        update.ChatJoinRequest.Chat.Id,
-                        lang.Translate("Message", string.IsNullOrWhiteSpace(update.ChatJoinRequest.From.Username) ? update.ChatJoinRequest.From.FirstName : update.ChatJoinRequest.From.Username, min),
-                        messageThreadId: (update.ChatJoinRequest.Chat.IsForum ?? false) ? dataBase.GetCollection<ChatData>("chats").FindById(update.ChatJoinRequest.Chat.Id).MessageThreadId : default,
-                        replyMarkup: new InlineKeyboardMarkup(new[]
-                        {
-                        InlineKeyboardButton.WithCallbackData(lang["VerifyButton"]),
-                        }));
-                    groupData[update.ChatJoinRequest.Chat.Id][msg.MessageId] = update.ChatJoinRequest.UserChatId;
-                    Timer timer = new(min * 60000)
-                    {
-                        AutoReset = false,
-                    };
-                    timer.Elapsed += async (_, _) =>
-                    {
-                        if (!groupData.TryGetValue(update.ChatJoinRequest.Chat.Id, out Dictionary<int, long> members) || !members.ContainsKey(msg.MessageId))
-                        {
-                            return;
-                        }
-                        members.Remove(msg.MessageId);
-                        await botClient.DeleteMessageAsync(update.ChatJoinRequest.Chat.Id, msg.MessageId);
-                    };
-                    timer.Start();
-                    break;
-                }
-        }
-    }
-    catch (Exception e)
-    {
-        Console.WriteLine(e);
+                    members.Remove(msg.MessageId);
+                    await botClient.DeleteMessageAsync(update.ChatJoinRequest.Chat.Id, msg.MessageId);
+                };
+                timer.Start();
+                break;
+            }
     }
 }, (_, e, _) => { ExceptionDispatchInfo.Capture(e).Throw(); });
 while (true)