diff --git a/app/Listeners/Menu/ShowInAdmin.php b/app/Listeners/Menu/ShowInAdmin.php
index d2c94b1d..b1d0f791 100644
--- a/app/Listeners/Menu/ShowInAdmin.php
+++ b/app/Listeners/Menu/ShowInAdmin.php
@@ -20,7 +20,34 @@ class ShowInAdmin
      */
     public function handle(Event $event): void
     {
-        $this->renderSections($event->menu, self::groupPayables(SidebarPermissions::navigationFor(user())));
+        $this->renderSections($event->menu, self::groupBasicData(self::groupPayables(SidebarPermissions::navigationFor(user()))));
+    }
+
+    public static function groupBasicData(array $navigation): array
+    {
+        $keys = ['order-data', 'refunds'];
+        $children = array_values(array_filter($navigation, static fn (array $section): bool => in_array($section['slug'], $keys, true)));
+        if ($children === []) {
+            return $navigation;
+        }
+
+        $group = ['slug' => 'basic-data', 'title' => '基础数据', 'icon' => 'folder', 'sections' => $children];
+        $hasDirectory = in_array('basic-data', array_column($navigation, 'slug'), true);
+        $result = [];
+        foreach ($navigation as $section) {
+            if ($section['slug'] === 'basic-data') {
+                $result[] = array_replace($section, ['sections' => $children]);
+            } elseif (in_array($section['slug'], $keys, true)) {
+                if (! $hasDirectory) {
+                    $result[] = $group;
+                    $hasDirectory = true;
+                }
+            } else {
+                $result[] = $section;
+            }
+        }
+
+        return $result;
     }
 
     public static function groupPayables(array $navigation): array
diff --git a/config/business_navigation.php b/config/business_navigation.php
index 1855f019..680f167b 100644
--- a/config/business_navigation.php
+++ b/config/business_navigation.php
@@ -289,6 +289,12 @@ $navigation = [
             ],
         ],
     ],
+    [
+        'slug' => 'basic-data',
+        'title' => '基础数据',
+        'icon' => 'folder',
+        'pages' => [],
+    ],
     [
         'slug' => 'product-inventory',
         'title' => '商品及库存管理',
diff --git a/tests/Unit/View/BasicDataNavigationTest.php b/tests/Unit/View/BasicDataNavigationTest.php
new file mode 100644
index 00000000..162b25db
--- /dev/null
+++ b/tests/Unit/View/BasicDataNavigationTest.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace Tests\Unit\View;
+
+use PHPUnit\Framework\TestCase;
+use App\Listeners\Menu\ShowInAdmin;
+
+require_once dirname(__DIR__, 3) . '/app/Listeners/Menu/ShowInAdmin.php';
+
+class BasicDataNavigationTest extends TestCase
+{
+    public function test_group_moves_only_order_data_and_refunds_without_changing_pages(): void
+    {
+        $navigation = require dirname(__DIR__, 3) . '/config/business_navigation.php';
+        $grouped = ShowInAdmin::groupBasicData($navigation);
+        $slugs = array_column($grouped, 'slug');
+        $group = $grouped[array_search('basic-data', $slugs, true)];
+        $this->assertSame(['order-data', 'refunds'], array_column($group['sections'], 'slug'));
+        $this->assertNotContains('order-data', $slugs);
+        $this->assertNotContains('refunds', $slugs);
+        foreach ($group['sections'] as $section) {
+            $this->assertSame($navigation[array_search($section['slug'], array_column($navigation, 'slug'), true)], $section);
+        }
+    }
+
+    public function test_group_contains_only_authorized_sections_even_without_directory_permission(): void
+    {
+        $allowed = [['slug' => 'refunds', 'title' => '退款', 'pages' => [['slug' => 'non-jingxi-refund-data']]]];
+        $grouped = ShowInAdmin::groupBasicData($allowed);
+        $this->assertSame($allowed, $grouped[0]['sections']);
+        $this->assertSame([], ShowInAdmin::groupBasicData([]));
+    }
+
+    public function test_basic_data_is_an_empty_top_level_directory_before_invoice_management(): void
+    {
+        $navigation = require dirname(__DIR__, 3) . '/config/business_navigation.php';
+        $slugs = array_column($navigation, 'slug');
+        $index = array_search('basic-data', $slugs, true);
+
+        $this->assertNotFalse($index);
+        $this->assertSame('基础数据', $navigation[$index]['title']);
+        $this->assertSame([], $navigation[$index]['pages']);
+        $this->assertSame('invoice-management', $slugs[$index + 1]);
+        $this->assertCount(1, array_keys($slugs, 'basic-data', true));
+    }
+}