diff --git a/db/ConfigBuilder.cpp b/db/ConfigBuilder.cpp
index cec12f9..066186a 100644
--- a/db/ConfigBuilder.cpp
+++ b/db/ConfigBuilder.cpp
@@ -93,27 +93,46 @@ namespace NekoGui {
     }
 
     QString BuildChain(int chainId, const std::shared_ptr<BuildConfigStatus> &status) {
-        // Make list
-        QList<std::shared_ptr<ProxyEntity>> ents;
-        auto ent = status->ent;
-        auto result = status->result;
+        auto group = profileManager->GetGroup(status->ent->gid);
+        if (group == nullptr) {
+            status->result->error = QString("This profile is not in any group, your data may be corrupted.");
+            return {};
+        }
 
-        if (ent->type == "chain") {
-            auto list = ent->ChainBean()->list;
-            std::reverse(std::begin(list), std::end(list));
-            for (auto id: list) {
-                ents += profileManager->GetProfile(id);
-                if (ents.last() == nullptr) {
-                    status->result->error = QString("chain missing ent: %1").arg(id);
-                    return {};
-                }
-                if (ents.last()->type == "chain") {
-                    status->result->error = QString("chain in chain is not allowed: %1").arg(id);
-                    return {};
+        auto resolveChain = [=](const std::shared_ptr<ProxyEntity> &ent) {
+            QList<std::shared_ptr<ProxyEntity>> resolved;
+            if (ent->type == "chain") {
+                auto list = ent->ChainBean()->list;
+                std::reverse(std::begin(list), std::end(list));
+                for (auto id: list) {
+                    resolved += profileManager->GetProfile(id);
+                    if (resolved.last() == nullptr) {
+                        status->result->error = QString("chain missing ent: %1").arg(id);
+                        break;
+                    }
+                    if (resolved.last()->type == "chain") {
+                        status->result->error = QString("chain in chain is not allowed: %1").arg(id);
+                        break;
+                    }
                 }
+            } else {
+                resolved += ent;
+            };
+            return resolved;
+        };
+
+        // Make list
+        auto ents = resolveChain(status->ent);
+        if (!status->result->error.isEmpty()) return {};
+
+        if (group->front_proxy_id >= 0) {
+            auto fEnt = profileManager->GetProfile(group->front_proxy_id);
+            if (fEnt == nullptr) {
+                status->result->error = QString("front proxy ent not found.");
+                return {};
             }
-        } else {
-            ents += ent;
+            ents += resolveChain(fEnt);
+            if (!status->result->error.isEmpty()) return {};
         }
 
         // BuildChain
diff --git a/db/Database.cpp b/db/Database.cpp
index 5efba31..85152d0 100644
--- a/db/Database.cpp
+++ b/db/Database.cpp
@@ -207,6 +207,7 @@ namespace NekoGui {
 
     Group::Group() {
         _add(new configItem("id", &id, itemType::integer));
+        _add(new configItem("front_proxy_id", &front_proxy_id, itemType::integer));
         _add(new configItem("archive", &archive, itemType::boolean));
         _add(new configItem("name", &name, itemType::string));
         _add(new configItem("order", &order, itemType::integerList));
diff --git a/db/Group.hpp b/db/Group.hpp
index f6e0a36..1dfd743 100644
--- a/db/Group.hpp
+++ b/db/Group.hpp
@@ -12,6 +12,7 @@ namespace NekoGui {
         QString url = "";
         QString info = "";
         qint64 sub_last_update = 0;
+        int front_proxy_id = -1;
 
         // list ui
         bool manually_column_width = false;
diff --git a/translations/fa_IR.ts b/translations/fa_IR.ts
index 054d80d..6b4607d 100644
--- a/translations/fa_IR.ts
+++ b/translations/fa_IR.ts
@@ -290,6 +290,14 @@ For NekoBox, this rewrites the underlying(localhost) DNS in VPN mode, normal mod
         <source>Manually column width</source>
         <translation>عرض ستون به صورت دستی</translation>
     </message>
+    <message>
+        <source>Front Proxy</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>None</source>
+        <translation type="unfinished">هیچ یک</translation>
+    </message>
 </context>
 <context>
     <name>DialogEditProfile</name>
diff --git a/translations/zh_CN.ts b/translations/zh_CN.ts
index 8063456..63ae7b0 100644
--- a/translations/zh_CN.ts
+++ b/translations/zh_CN.ts
@@ -290,6 +290,14 @@ For NekoBox, this rewrites the underlying(localhost) DNS in VPN mode, normal mod
         <source>Manually column width</source>
         <translation>手动调节列宽</translation>
     </message>
+    <message>
+        <source>Front Proxy</source>
+        <translation>前置代理</translation>
+    </message>
+    <message>
+        <source>None</source>
+        <translation>无</translation>
+    </message>
 </context>
 <context>
     <name>DialogEditProfile</name>
diff --git a/ui/edit/dialog_edit_group.cpp b/ui/edit/dialog_edit_group.cpp
index 32e60f4..d560aee 100644
--- a/ui/edit/dialog_edit_group.cpp
+++ b/ui/edit/dialog_edit_group.cpp
@@ -2,12 +2,13 @@
 #include "ui_dialog_edit_group.h"
 
 #include "db/Database.hpp"
+#include "ui/mainwindow_interface.h"
 
 #include <QClipboard>
 
-DialogEditGroup::DialogEditGroup(const std::shared_ptr<NekoGui::Group> &ent, QWidget *parent)
-    : QDialog(parent), ui(new Ui::DialogEditGroup) {
+DialogEditGroup::DialogEditGroup(const std::shared_ptr<NekoGui::Group> &ent, QWidget *parent) : QDialog(parent), ui(new Ui::DialogEditGroup) {
     ui->setupUi(this);
+    this->ent = ent;
 
     connect(ui->type, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, [=](int index) {
         ui->cat_sub->setHidden(index == 0);
@@ -21,27 +22,20 @@ DialogEditGroup::DialogEditGroup(const std::shared_ptr<NekoGui::Group> &ent, QWi
     ui->manually_column_width->setChecked(ent->manually_column_width);
     ui->copy_links->setVisible(false);
     ui->copy_links_nkr->setVisible(false);
+
     if (ent->id >= 0) { // already a group
         ui->type->setDisabled(true);
         if (!ent->Profiles().isEmpty()) {
             ui->copy_links->setVisible(true);
             ui->copy_links_nkr->setVisible(true);
         }
+    } else { // new group
+        ui->front_proxy->hide();
+        ui->front_proxy_l->hide();
     }
 
-    connect(ui->buttonBox, &QDialogButtonBox::accepted, this, [=] {
-        if (ent->id >= 0) { // already a group
-            if (!ent->url.isEmpty() && ui->url->text().isEmpty()) {
-                MessageBoxWarning(tr("Warning"), tr("Please input URL"));
-                return;
-            }
-        }
-        ent->name = ui->name->text();
-        ent->url = ui->url->text();
-        ent->archive = ui->archive->isChecked();
-        ent->manually_column_width = ui->manually_column_width->isChecked();
-        QDialog::accept();
-    });
+    CACHE.front_proxy = ent->front_proxy_id;
+    refresh_front_proxy();
 
     connect(ui->copy_links, &QPushButton::clicked, this, [=] {
         QStringList links;
@@ -66,3 +60,35 @@ DialogEditGroup::DialogEditGroup(const std::shared_ptr<NekoGui::Group> &ent, QWi
 DialogEditGroup::~DialogEditGroup() {
     delete ui;
 }
+
+void DialogEditGroup::accept() {
+    if (ent->id >= 0) { // already a group
+        if (!ent->url.isEmpty() && ui->url->text().isEmpty()) {
+            MessageBoxWarning(tr("Warning"), tr("Please input URL"));
+            return;
+        }
+    }
+    ent->name = ui->name->text();
+    ent->url = ui->url->text();
+    ent->archive = ui->archive->isChecked();
+    ent->manually_column_width = ui->manually_column_width->isChecked();
+    ent->front_proxy_id = CACHE.front_proxy;
+    QDialog::accept();
+}
+
+void DialogEditGroup::refresh_front_proxy() {
+    auto fEnt = NekoGui::profileManager->GetProfile(CACHE.front_proxy);
+    ui->front_proxy->setText(fEnt == nullptr ? tr("None") : fEnt->bean->DisplayTypeAndName());
+}
+
+void DialogEditGroup::on_front_proxy_clicked() {
+    auto parent = dynamic_cast<QWidget *>(this->parent());
+    parent->hide();
+    this->hide();
+    GetMainWindow()->start_select_mode(this, [=](int id) {
+        CACHE.front_proxy = id;
+        refresh_front_proxy();
+        parent->show();
+        show();
+    });
+}
diff --git a/ui/edit/dialog_edit_group.h b/ui/edit/dialog_edit_group.h
index c6c678e..5aa3d9f 100644
--- a/ui/edit/dialog_edit_group.h
+++ b/ui/edit/dialog_edit_group.h
@@ -19,4 +19,18 @@ public:
 
 private:
     Ui::DialogEditGroup *ui;
+
+    std::shared_ptr<NekoGui::Group> ent;
+
+    struct {
+        int front_proxy;
+    } CACHE;
+
+    void refresh_front_proxy();
+
+private slots:
+
+    void accept() override;
+
+    void on_front_proxy_clicked();
 };
diff --git a/ui/edit/dialog_edit_group.ui b/ui/edit/dialog_edit_group.ui
index ae920e6..423d0f5 100644
--- a/ui/edit/dialog_edit_group.ui
+++ b/ui/edit/dialog_edit_group.ui
@@ -84,6 +84,20 @@
         </item>
        </widget>
       </item>
+      <item row="2" column="1">
+       <widget class="QPushButton" name="front_proxy">
+        <property name="text">
+         <string notr="true"/>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="front_proxy_l">
+        <property name="text">
+         <string>Front Proxy</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>
@@ -177,5 +191,21 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>DialogEditGroup</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>199</x>
+     <y>291</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>199</x>
+     <y>157</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
 </ui>
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index a3d39f4..a92efa3 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -592,13 +592,15 @@ void MainWindow::dialog_message_impl(const QString &sender, const QString &info)
 
 inline bool dialog_is_using = false;
 
-#define USE_DIALOG(a)            \
-    if (dialog_is_using) return; \
-    dialog_is_using = true;      \
-    auto dialog = new a(this);   \
-    dialog->exec();              \
-    dialog->deleteLater();       \
-    dialog_is_using = false;
+#define USE_DIALOG(a)                               \
+    if (dialog_is_using) return;                    \
+    dialog_is_using = true;                         \
+    auto dialog = new a(this);                      \
+    connect(dialog, &QDialog::finished, this, [=] { \
+        dialog->deleteLater();                      \
+        dialog_is_using = false;                    \
+    });                                             \
+    dialog->show();
 
 void MainWindow::on_menu_basic_settings_triggered() {
     USE_DIALOG(DialogBasicSettings)
diff --git a/ui/widget/GroupItem.cpp b/ui/widget/GroupItem.cpp
index 19f307d..195ee98 100644
--- a/ui/widget/GroupItem.cpp
+++ b/ui/widget/GroupItem.cpp
@@ -45,6 +45,7 @@ GroupItem::GroupItem(QWidget *parent, const std::shared_ptr<NekoGui::Group> &ent
     ui->setupUi(this);
     this->setLayoutDirection(Qt::LeftToRight);
 
+    this->parentWindow = parent;
     this->ent = ent;
     this->item = item;
     if (ent == nullptr) return;
@@ -102,15 +103,16 @@ void GroupItem::on_update_sub_clicked() {
 }
 
 void GroupItem::on_edit_clicked() {
-    auto dialog = new DialogEditGroup(ent, this);
-    int ret = dialog->exec();
-    dialog->deleteLater();
-
-    if (ret == QDialog::Accepted) {
-        ent->Save();
-        refresh_data();
-        MW_dialog_message(Dialog_DialogManageGroups, "refresh" + Int2String(ent->id));
-    }
+    auto dialog = new DialogEditGroup(ent, parentWindow);
+    connect(dialog, &QDialog::finished, this, [=] {
+        if (dialog->result() == QDialog::Accepted) {
+            ent->Save();
+            refresh_data();
+            MW_dialog_message(Dialog_DialogManageGroups, "refresh" + Int2String(ent->id));
+        }
+        dialog->deleteLater();
+    });
+    dialog->show();
 }
 
 void GroupItem::on_remove_clicked() {
diff --git a/ui/widget/GroupItem.h b/ui/widget/GroupItem.h
index 61c7e58..14aa864 100644
--- a/ui/widget/GroupItem.h
+++ b/ui/widget/GroupItem.h
@@ -27,6 +27,8 @@ public:
 private:
     Ui::GroupItem *ui;
 
+    QWidget *parentWindow;
+
 signals:
 
     void edit_clicked();