diff --git a/.vscode/settings.json b/.vscode/settings.json
index e700a27..eaca38c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -143,7 +143,11 @@
         "fstream": "cpp",
         "xmemory0": "cpp",
         "xstddef": "cpp",
-        "xtree": "cpp"
+        "xtree": "cpp",
+        "qxmlstreamwriter": "cpp",
+        "qgraphicsdropshadoweffect": "cpp",
+        "qpushbutton": "cpp",
+        "qpainter": "cpp"
     },
     "editor.tokenColorCustomizations": {
         "textMateRules": [
diff --git a/ClientCore/ClientCore.cpp b/ClientCore/ClientCore.cpp
index 40bc81a..fdf166e 100644
--- a/ClientCore/ClientCore.cpp
+++ b/ClientCore/ClientCore.cpp
@@ -181,6 +181,14 @@ void ClientCore::UseFrame(QSharedPointer<FrameBuffer> frame)
         emit sigOffline(frame);
         break;
     }
+    case FBT_MSGINFO_ASK: {
+        emit sigMsgAsk(frame);
+        break;
+    }
+    case FBT_MSGINFO_ANSWER: {
+        emit sigMsgAnswer(frame);
+        break;
+    }
     default:
         qCritical() << QString("未知的帧类型： %1").arg(frame->type);
         break;
diff --git a/ClientCore/ClientCore.h b/ClientCore/ClientCore.h
index 07052fd..bb700b6 100644
--- a/ClientCore/ClientCore.h
+++ b/ClientCore/ClientCore.h
@@ -78,6 +78,8 @@ signals:
     void sigFileInfo(QSharedPointer<FrameBuffer> frame);
     void sigOffline(QSharedPointer<FrameBuffer> frame);
     void sigYourId(QSharedPointer<FrameBuffer> frame);
+    void sigMsgAsk(QSharedPointer<FrameBuffer> frame);
+    void sigMsgAnswer(QSharedPointer<FrameBuffer> frame);
 
 signals:
     void conSuccess();
diff --git a/ClientCore/FileTrans.cpp b/ClientCore/FileTrans.cpp
index d217fd5..0bba515 100644
--- a/ClientCore/FileTrans.cpp
+++ b/ClientCore/FileTrans.cpp
@@ -333,7 +333,6 @@ void FileTrans::SendFile(const QSharedPointer<DoTransTask>& task)
     auto* sendThread = new SendThread(clientCore_);
     sendThread->setTask(task);
     QMutexLocker locker(&sthMut_);
-    // TODO: check if already exist
     upTasks_[task->task.localId] = sendThread;
     sendThread->run();
 }
diff --git a/Gui/CMakeLists.txt b/Gui/CMakeLists.txt
index d4d316b..2e6bec9 100644
--- a/Gui/CMakeLists.txt
+++ b/Gui/CMakeLists.txt
@@ -10,8 +10,8 @@ set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 add_definitions(-DUSE_QT_GUI)
-find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Network)
-find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Network)
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Network Concurrent)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Network Concurrent)
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 set(PROJECT_SOURCES main.cpp
@@ -26,7 +26,7 @@ Form/Transform.h Form/Transform.cpp Form/Transform.ui
 Control/cusTableWidget.cpp Control/cusTableWidget.h
 Control/cpTableWidget.h Control/cpTableWidget.cpp
 GuiUtil/Config.h GuiUtil/Config.cpp
-../Res/qss.qrc
+../Res/qss.qrc Form/Loading.h Form/Loading.cpp
 )
 
 if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
@@ -55,8 +55,9 @@ endif()
 target_link_libraries(frelayGUI PRIVATE 
     Qt${QT_VERSION_MAJOR}::Widgets
     Qt${QT_VERSION_MAJOR}::Network
+    Qt${QT_VERSION_MAJOR}::Concurrent
     ClientCore Protocol 
-    Util
+    Util 
     Struct SingleApplication::SingleApplication
 )
 
diff --git a/Gui/Control/CompareControl.cpp b/Gui/Control/CompareControl.cpp
index d175b89..da57725 100644
--- a/Gui/Control/CompareControl.cpp
+++ b/Gui/Control/CompareControl.cpp
@@ -6,6 +6,7 @@
 #include <QXmlStreamReader>
 #include <QXmlStreamWriter>
 
+#include "Form/Loading.h"
 #include "GuiUtil/Public.h"
 #include "ui_CompareControl.h"
 
@@ -80,6 +81,13 @@ void Compare::InitControl()
     connect(ui->btnLoad, &QPushButton::clicked, this, &Compare::Load);
     connect(ui->btnLeft, &QPushButton::clicked, this, &Compare::TransToLeft);
     connect(ui->btnRight, &QPushButton::clicked, this, &Compare::TransToRight);
+
+    // 测试代码
+    connect(ui->btnReplace, &QPushButton::clicked, this, [this]() {
+        // auto* loading = new LoadingDialog(this);
+        // loading->exec();
+    });
+
     LoadTitles();
 }
 
diff --git a/Gui/Form/Loading.cpp b/Gui/Form/Loading.cpp
new file mode 100644
index 0000000..ce6be89
--- /dev/null
+++ b/Gui/Form/Loading.cpp
@@ -0,0 +1,139 @@
+#include "Loading.h"
+
+LoadingDialog::LoadingDialog(QWidget* parent) : QDialog(parent)
+{
+    // 如果需要显示任务栏对话框则删除Qt::Tool
+    setWindowFlags(Qt::FramelessWindowHint | Qt::Tool | Qt::WindowStaysOnTopHint);
+    setAttribute(Qt::WA_TranslucentBackground, true);
+    initUi();
+}
+
+/**
+ * @brief LoadingDialog::initUi UI元素初始化
+ */
+void LoadingDialog::initUi()
+{
+    this->setFixedSize(250, 250);
+    m_pCenterFrame = new QFrame(this);
+    m_pCenterFrame->setGeometry(10, 10, 230, 230);
+
+    // 加载Loading动画
+    m_pLoadingMovie = new QMovie(":/ico/loading.gif");
+    m_pLoadingMovie->setScaledSize(QSize(120, 120));
+    m_pMovieLabel = new QLabel(m_pCenterFrame);
+    m_pMovieLabel->setGeometry(55, 10, 120, 120);
+    m_pMovieLabel->setScaledContents(true);
+    m_pMovieLabel->setMovie(m_pLoadingMovie);
+    m_pLoadingMovie->start();
+
+    // 提示文本
+    m_pTipsLabel = new QLabel(m_pCenterFrame);
+    m_pTipsLabel->setGeometry(5, 130, 220, 50);
+    m_pTipsLabel->setAlignment(Qt::AlignCenter | Qt::AlignHCenter);
+    m_pTipsLabel->setObjectName("tips");
+    m_pTipsLabel->setText("加载中,请稍候...");
+    m_pTipsLabel->setStyleSheet("QLabel#tips{font-family:\"Microsoft YaHei\";font-size: 15px;color: #333333;}");
+
+    // 取消按钮
+    m_pCancelBtn = new QPushButton(m_pCenterFrame);
+    m_pCancelBtn->setObjectName("cancelBtn");
+    m_pCancelBtn->setText("取消等待");
+    m_pCancelBtn->setStyleSheet("QPushButton#cancelBtn{"
+                                "background-color: #edeef6;"
+                                "border-radius: 4px;"
+                                "font-family: \"Microsoft YaHei\";"
+                                "font-size: 14px;"
+                                "color: #333333;"
+                                "}"
+                                "QPushButton#cancelBtn::hover{"
+                                "background:#dcdeea"
+                                "}");
+    m_pCancelBtn->setGeometry(25, 180, 180, 35);
+    m_pCancelBtn->setEnabled(true);
+    connect(m_pCancelBtn, &QPushButton::clicked, this, &LoadingDialog::cancelBtnClicked);
+
+    // 实例阴影shadow
+    QGraphicsDropShadowEffect* shadow = new QGraphicsDropShadowEffect(this);
+    shadow->setOffset(0, 0);
+    shadow->setColor(QColor(32, 101, 165));
+    shadow->setBlurRadius(10);
+    this->setGraphicsEffect(shadow);
+}
+
+/**
+ * @brief LoadingDialog::setTipsText 设置提示文本
+ * @param strTipsText 提示文本
+ */
+void LoadingDialog::setTipsText(QString strTipsText)
+{
+    m_pTipsLabel->setText(strTipsText);
+}
+
+/**
+ * @brief LoadingDialog::setCanCancel 设置是够允许用户点击取消等待按钮
+ * @param bCanCancel 是够允许
+ */
+void LoadingDialog::setCanCancel(bool bCanCancel)
+{
+    m_pCancelBtn->setEnabled(bCanCancel);
+}
+
+/**
+ * @brief LoadingDialog::moveToCenter 移动对话框到指定窗口中间
+ * @param pParent 指定窗口指针
+ */
+void LoadingDialog::moveToCenter(QWidget* pParent)
+{
+    if (pParent != nullptr && pParent != NULL) {
+        int nParentWidth = pParent->width();
+        int nParentHeigth = pParent->height();
+
+        int nWidth = this->width();
+        int nHeight = this->height();
+
+        int nParentX = pParent->x();
+        int nParentY = pParent->y();
+
+        int x = (nParentX + (nParentWidth - nWidth) / 2);
+        int y = (nParentY + (nParentHeigth - nHeight) / 2);
+
+        this->move(x, y);
+    }
+}
+
+/**
+ * @brief LoadingDialog::cancelBtnClicked 取消按钮槽函数
+ */
+void LoadingDialog::cancelBtnClicked()
+{
+    emit cancelWaiting();
+    this->done(USER_CANCEL);
+}
+
+/**
+ * @brief LoadingDialog::paintEvent 界面绘制
+ * @param event
+ */
+void LoadingDialog::paintEvent(QPaintEvent* event)
+{
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing);   // 反锯齿
+    painter.setBrush(QBrush(Qt::white));
+    painter.setPen(Qt::transparent);
+    QRect rect = this->rect();
+    rect.setLeft(9);
+    rect.setTop(9);
+    rect.setWidth(rect.width() - 9);
+    rect.setHeight(rect.height() - 9);
+    painter.drawRoundedRect(rect, 8, 8);
+    QWidget::paintEvent(event);
+}
+
+LoadingDialog::~LoadingDialog()
+{
+    delete m_pLoadingMovie;
+    delete m_pMovieLabel;
+    delete m_pTipsLabel;
+    delete m_pCancelBtn;
+    delete m_pCenterFrame;
+}
diff --git a/Gui/Form/Loading.h b/Gui/Form/Loading.h
new file mode 100644
index 0000000..9af0c81
--- /dev/null
+++ b/Gui/Form/Loading.h
@@ -0,0 +1,45 @@
+#ifndef LOADINGDIALOG_H
+#define LOADINGDIALOG_H
+
+#include <QDialog>
+#include <QGraphicsDropShadowEffect>
+#include <QLabel>
+#include <QMovie>
+#include <QPainter>
+#include <QPushButton>
+#define USER_CANCEL -1
+
+// LoadingDialog 改造来源：https://blog.csdn.net/weixin_42105886/article/details/114665272
+class LoadingDialog : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit LoadingDialog(QWidget* parent = nullptr);
+    ~LoadingDialog();
+    // 设置提示文本
+    void setTipsText(QString strTipsText);
+    // 设置是否显示取消等待按钮
+    void setCanCancel(bool bCanCancel);
+    // 移动到指定窗口中间显示
+    void moveToCenter(QWidget* pParent);
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+    void initUi();
+    
+Q_SIGNALS:
+    void cancelWaiting();
+
+private slots:
+    void cancelBtnClicked();
+
+private:
+    QFrame* m_pCenterFrame;
+    QLabel* m_pMovieLabel;
+    QMovie* m_pLoadingMovie;
+    QLabel* m_pTipsLabel;
+    QPushButton* m_pCancelBtn;
+};
+#endif   // LOADINGDIALOG_H
\ No newline at end of file
diff --git a/Note/version.md b/Note/version.md
index 86ae040..4a57532 100644
--- a/Note/version.md
+++ b/Note/version.md
@@ -16,7 +16,7 @@
 |  23  | 问题 | 作为接收端如果对方断联要处理这个情况。                       |      |  0.2.2   |          |
 |  22  | 功能 | 配置可以切组。                                               |      |  0.2.2   |          |
 |  21  | 功能 | 可以传输文件夹。                                             |      |  0.2.2   |          |
-|  20  | 功能 | 对照传输可以打开本地文件夹。                                 |      |  0.2.2   |          |
+|  20  | 功能 | 对照传输可以打开本地文件夹。                                 |      |  0.2.2   |  0.2.3   |
 |  19  | 问题 | 客户之间心跳包，被动/主动失联后断开，清除相关内容，终止相关任务。 |      |  0.2.2   |  0.2.3   |
 |  18  | 问题 | 断开后重连貌似没有发送心跳包。                               |      |   0.1    |   0.2    |
 |  17  | 问题 | 服务端主动踢出的客户端，主动重连假链接，不可用无反应。       |      |   0.1    |   0.2    |
diff --git a/Protocol/Protocol.h b/Protocol/Protocol.h
index d52d8f5..cc03af2 100644
--- a/Protocol/Protocol.h
+++ b/Protocol/Protocol.h
@@ -36,9 +36,16 @@ enum FrameBufferType : uint16_t {
     FBT_CLI_FILE_BUFFER,
     FBT_CLI_TRANS_DONE,
     FBT_CLI_TRANS_FAILED,
-    FBT_CLI_FILE_INFO
+    FBT_CLI_FILE_INFO,
+    FBT_MSGINFO_ASK,
+    FBT_MSGINFO_ANSWER
 };
 
+// 字符串标识
+#define STRMSG_CHECK_FILE_EXIST "checkFileExist"
+#define STRMSG_FILE_EXIST "fileExist"
+#define STRMSG_FILE_NOT_EXIST "fileNotExist"
+
 struct FrameBuffer {
     QByteArray data;
     QString fid;
diff --git a/Res/frelay.qrc b/Res/frelay.qrc
index 727aff0..3e706d6 100644
--- a/Res/frelay.qrc
+++ b/Res/frelay.qrc
@@ -2,5 +2,6 @@
     <qresource prefix="/ico">
         <file>main.ico</file>
         <file>server.ico</file>
+        <file>loading.gif</file>
     </qresource>
 </RCC>
diff --git a/Res/loading.gif b/Res/loading.gif
new file mode 100644
index 0000000..b343823
Binary files /dev/null and b/Res/loading.gif differ
diff --git a/Struct/InfoMsg.h b/Struct/InfoMsg.h
index 90f094f..d530eca 100644
--- a/Struct/InfoMsg.h
+++ b/Struct/InfoMsg.h
@@ -9,23 +9,34 @@
 
 struct InfoMsg {
     qint32 mark{};
+    QString command;
     QString msg;
     QString fromPath;
     QString toPath;
     quint64 size{};
     quint32 permissions{};
+    QVector<QString> list;
 
     void serialize(QDataStream& data) const
     {
-        data << mark << msg << fromPath << toPath << size << permissions;
+        data << mark << command << msg << fromPath << toPath << size << permissions;
+        data << list.size();
+        for (const auto& item : list) {
+            data << item;
+        }
     }
 
     void deserialize(QDataStream& data)
     {
-        data >> mark >> msg >> fromPath >> toPath >> size >> permissions;
+        data >> mark >> command >> msg >> fromPath >> toPath >> size >> permissions;
+        qint32 listSize;
+        data >> listSize;
+        list.resize(listSize);
+        for (auto& item : list) {
+            data >> item;
+        }
     }
 };
-
 QDataStream& operator<<(QDataStream& data, const InfoMsg& info);
 QDataStream& operator>>(QDataStream& data, InfoMsg& info);