diff --git a/ClientCore/FileTrans.cpp b/ClientCore/FileTrans.cpp
index 0656cee..67b21d9 100644
--- a/ClientCore/FileTrans.cpp
+++ b/ClientCore/FileTrans.cpp
@@ -1,13 +1,81 @@
 #include "FileTrans.h"
+#include <QFileInfo>
 
 FileTrans::FileTrans(ClientCore* clientCore) : clientCore_(clientCore)
 {
     RegisterFrameCall();
 }
 
-void FileTrans::SetTasks(const QVector<TransTask>& tasks)
+/*
+ *   When the local client actively sends a file, it cannot simultaneously perform download operations.
+ *   Passive sending is an exception, primarily to monitor the sending progress. In contrast,
+ *   the progress of passive sending is monitored by the requesting download side,
+ *   so there is no need to track the progress locally.
+ */
+void FileTrans::ReqSendFile(const TransTask& task)
 {
-    localTasks_ = tasks;
+    // TODO: check if running...
+
+    // start
+    InfoMsg info;
+    info.toPath = task.remotePath;
+    info.fromPath = task.localPath;
+
+    QFileInfo fileInfo(info.fromPath);
+    if (fileInfo.exists()) {
+        qint64 size = fileInfo.size();
+        info.permissions = static_cast<quint32>(fileInfo.permissions());
+        info.size = size;
+    } else {
+        sigError(QString(tr("File [%1] not exit.")).arg(info.fromPath));
+        return;
+    }
+    
+    if (!clientCore_->Send<InfoMsg>(info, FBT_CLI_REQ_SEND, task.remoteId)) {
+        sigError(QString(tr("send req send failed: %1")).arg(info.msg));
+        sendTask_.state = TaskState::STATE_NONE;
+        return;
+	}
+    sendTask_.state = TaskState::STATE_RUNNING;
+    sendTask_.totalSize = info.size;
+    sendTask_.tranSize = 0;
+}
+
+void FileTrans::ReqDownFile(const TransTask& task)
+{
+    // TODO: check if running...
+
+    // start
+    InfoMsg info;
+    info.toPath = task.localPath;
+    info.fromPath = task.remotePath;
+
+    if (!clientCore_->Send<InfoMsg>(info, FBT_CLI_REQ_DOWN, task.remoteId)) {
+        sigError(QString(tr("send req send failed: %1")).arg(info.msg));
+        sendTask_.state = TaskState::STATE_NONE;
+        return;
+    }
+    sendTask_.state = TaskState::STATE_RUNNING;
+}
+
+qint32 FileTrans::GetSendProgress()
+{
+    if (sendTask_.state != TaskState::STATE_RUNNING) {
+        return -1;
+    }
+
+    double per = (sendTask_.tranSize * 100.0) / sendTask_.totalSize;
+    return per;
+}
+
+qint32 FileTrans::GetDownProgress()
+{
+    if (downTask_.state != TaskState::STATE_RUNNING) {
+        return -1;
+    }
+
+    double per = (downTask_.tranSize * 100.0) / downTask_.totalSize;
+    return per;
 }
 
 void FileTrans::RegisterFrameCall()
@@ -152,7 +220,8 @@ void FileTrans::SendFile(const QSharedPointer<DoTransTask>& task)
     auto* sendThread = new SendThread(clientCore_);
     sendThread->setTask(task);
     QMutexLocker locker(&sthMut_);
-    sendThreads_.push_back(sendThread);
+    // TODO: check if already exist
+    upTasks_[task->task.localId] = sendThread;
     sendThread->run();
 }
 
diff --git a/ClientCore/FileTrans.h b/ClientCore/FileTrans.h
index 3ef2fd5..f800d73 100644
--- a/ClientCore/FileTrans.h
+++ b/ClientCore/FileTrans.h
@@ -52,12 +52,18 @@ private:
 class FileTrans : public QObject
 {
     Q_OBJECT
+
 public:
     FileTrans(ClientCore* clientCore);
 
 public:
-    void SetTasks(const QVector<TransTask>& tasks);
-    void RegisterFrameCall();
+    void ReqSendFile(const TransTask& task);
+    void ReqDownFile(const TransTask& task);
+    qint32 GetSendProgress();
+    qint32 GetDownProgress();
+
+signals:
+    void sigError(const QString& err);
 
 private:
     void fbtReqSend(QSharedPointer<FrameBuffer> frame);
@@ -71,19 +77,18 @@ private:
     void fbtTransFailed(QSharedPointer<FrameBuffer> frame);
 
 private:
+    void RegisterFrameCall();
     void SendFile(const QSharedPointer<DoTransTask>& task);
 
 private:
     DoTransTask downTask_;
+    DoTransTask sendTask_;
 
     QMutex lMut_;
     QMutex rMut_;
-    QVector<TransTask> localTasks_;
-    QVector<TransTask> remoteTasks_;
 
     ClientCore* clientCore_;
     QMutex sthMut_;
-    QVector<QThread*> sendThreads_;
     QMap<QString, QThread*> upTasks_;
 };
 
diff --git a/Gui/Control/FileControl.cpp b/Gui/Control/FileControl.cpp
index e17d736..9496ad9 100644
--- a/Gui/Control/FileControl.cpp
+++ b/Gui/Control/FileControl.cpp
@@ -33,7 +33,6 @@ void FileManager::SetModeStr(const QString& modeStr, int type, ClientCore* clien
         remotePtr->registerPathCall([this](const QString& path) { ShowPath(path); });
         remotePtr->registerFileCall([this](const DirFileInfoVec& info) { ShowFile(info); });
         remotePtr->setClientCore(clientCore);
-        fileTrans_ = new FileTrans(clientCore);
         fileHelper_ = remotePtr;
     }
 }
diff --git a/Gui/Control/FileControl.h b/Gui/Control/FileControl.h
index f291483..2ac889a 100644
--- a/Gui/Control/FileControl.h
+++ b/Gui/Control/FileControl.h
@@ -6,7 +6,6 @@
 #include <QWidget>
 #include <Util.h>
 #include <QMenu>
-#include <FileTrans.h>
 
 namespace Ui {
 class FileManager;
@@ -39,7 +38,6 @@ private:
     Ui::FileManager* ui;
     QString curRoot_;
     QMenu* menu_;
-    FileTrans* fileTrans_;
     std::shared_ptr<DirFileHelper> fileHelper_;
 };
 
diff --git a/Gui/Form/Transform.cpp b/Gui/Form/Transform.cpp
index 75863e6..2024e1f 100644
--- a/Gui/Form/Transform.cpp
+++ b/Gui/Form/Transform.cpp
@@ -1,4 +1,5 @@
 #include "Transform.h"
+
 #include <QMessageBox>
 
 #include "ui_Transform.h"
@@ -16,4 +17,23 @@ TransForm::~TransForm()
 void TransForm::SetClientCore(ClientCore* clientCore)
 {
     clientCore_ = clientCore;
+    fileTrans_ = new FileTrans(clientCore_);
+}
+
+void TransForm::SetTasks(const QVector<TransTask>& tasks)
+{
+    tasks_ = tasks;
+}
+
+void TransForm::startTask()
+{
+    for (auto& task : tasks_) {
+        
+    }
+}
+
+void TransForm::showEvent(QShowEvent* event)
+{
+    QDialog::showEvent(event);
+    startTask();
 }
diff --git a/Gui/Form/Transform.h b/Gui/Form/Transform.h
index 3c44fce..21254f1 100644
--- a/Gui/Form/Transform.h
+++ b/Gui/Form/Transform.h
@@ -4,6 +4,7 @@
 #include <ClientCore.h>
 #include <QDialog>
 #include <QFile>
+#include <FileTrans.h>
 
 namespace Ui {
 class TransForm;
@@ -19,9 +20,18 @@ public:
 
 public:
     void SetClientCore(ClientCore* clientCore);
+    void SetTasks(const QVector<TransTask>& tasks);
 
 private:
-    ClientCore* clientCore_;
+    void startTask();
+
+protected:
+    void showEvent(QShowEvent* event) override;
+
+private:
+    QVector<TransTask> tasks_;
+    FileTrans* fileTrans_{};
+    ClientCore* clientCore_{};
     Ui::TransForm* ui;
 };
 
diff --git a/README.md b/README.md
index 3462cd0..55451a1 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
 # frelay
 
 A tool that uses a relay server to upload and download files from remote clients.
+
+## Features
+
+1. Minimal configuration—simply start a server, connect to it, and begin transferring files.
+2. If you frequently transfer the same files repeatedly, frelay offers a local-remote file mapping feature for one-click transfers.
+
+## Disclaimer
+This tool is solely designed for simple file transmission between clients via a relay server. It does not include any security validation logic to prevent data attacks or similar threats. It is primarily intended for temporary, non-sensitive file transfers. Please close the software or disconnect from the relay server when not in use.