diff --git a/extension.json b/extension.json
index 52aec8b..ca8c444 100644
--- a/extension.json
+++ b/extension.json
@@ -142,6 +142,35 @@
 				"isekai-ve-formatdropdown-format-mw-heading6"
 			]
 		},
+		"ve.ext.isekai.paste": {
+			"scripts": [
+				"ve.ext.isekai.paste.js"
+			],
+			"targets": [
+				"desktop",
+				"mobile"
+			],
+			"dependencies": [
+				"ext.visualEditor.mwcore",
+				"ext.visualEditor.mwextensions"
+			]
+		},
+		"ve.ext.isekai.mainCategory": {
+			"scripts": [
+				"ve.ext.isekai.mainCategory.js"
+			],
+			"targets": [
+				"desktop",
+				"mobile"
+			],
+			"dependencies": [
+				"ext.visualEditor.mwcore",
+				"ext.visualEditor.mwextensions"
+			],
+			"messages": [
+				"isekai-ve-dialog-meta-categories-input-maincategorieslabel"
+			]
+		},
 		"ext.isekai.function-btn": {
 			"scripts": [
 				"ext.isekai.function-btn.js"
@@ -163,7 +192,8 @@
     "attributes": {
 		"VisualEditor": {
 			"PluginModules": [
-				"ve.ext.isekai.misc"
+				"ve.ext.isekai.misc",
+				"ve.ext.isekai.mainCategory"
 			]
 		}
 	},
@@ -184,6 +214,9 @@
 		},
 		"IsekaiActivateEditorRequiredWords": {
 			"value": 300
+		},
+		"IsekaiMainCategoriesIndexUrl": {
+			"value": "/index.php?title=Project:MainCategories.json&action=raw"
 		}
 	},
 	"manifest_version": 2
diff --git a/i18n/en.json b/i18n/en.json
index 5124df3..eb990c1 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -45,5 +45,7 @@
 	"isekai-ve-formatdropdown-format-mw-heading3": "Sub-heading 3",
 	"isekai-ve-formatdropdown-format-mw-heading4": "Sub-heading 4",
 	"isekai-ve-formatdropdown-format-mw-heading5": "Sub-heading 5",
-	"isekai-ve-formatdropdown-format-mw-heading6": "Sub-heading 6"
+	"isekai-ve-formatdropdown-format-mw-heading6": "Sub-heading 6",
+
+	"isekai-ve-dialog-meta-categories-input-maincategorieslabel": "Main categories"
 }
\ No newline at end of file
diff --git a/i18n/zh-hans.json b/i18n/zh-hans.json
index ffbdfa4..b36927d 100644
--- a/i18n/zh-hans.json
+++ b/i18n/zh-hans.json
@@ -45,5 +45,7 @@
 	"isekai-ve-formatdropdown-format-mw-heading3": "三级标题",
 	"isekai-ve-formatdropdown-format-mw-heading4": "四级标题",
 	"isekai-ve-formatdropdown-format-mw-heading5": "五级标题",
-	"isekai-ve-formatdropdown-format-mw-heading6": "六级标题"
+	"isekai-ve-formatdropdown-format-mw-heading6": "六级标题",
+
+	"isekai-ve-dialog-meta-categories-input-maincategorieslabel": "主要分类"
 }
\ No newline at end of file
diff --git a/i18n/zh-hant.json b/i18n/zh-hant.json
index b644b88..9b77141 100644
--- a/i18n/zh-hant.json
+++ b/i18n/zh-hant.json
@@ -45,5 +45,7 @@
 	"isekai-ve-formatdropdown-format-mw-heading3": "三级標題",
 	"isekai-ve-formatdropdown-format-mw-heading4": "四级標題",
 	"isekai-ve-formatdropdown-format-mw-heading5": "五级標題",
-	"isekai-ve-formatdropdown-format-mw-heading6": "六级標題"
+	"isekai-ve-formatdropdown-format-mw-heading6": "六级標題",
+	
+	"isekai-ve-dialog-meta-categories-input-maincategorieslabel": "主要分類"
 }
\ No newline at end of file
diff --git a/includes/Isekai.php b/includes/Isekai.php
index 3594d8e..96e558b 100644
--- a/includes/Isekai.php
+++ b/includes/Isekai.php
@@ -319,6 +319,7 @@ HTML
 
     public static function onResourceLoaderGetConfigVars(array &$vars, string $skin, Config $config){
         $vars['wgIsekaiShowAds'] = $config->get('IsekaiShowAds');
+        $vars['wgIsekaiMainCategoriesIndexUrl'] = $config->get('IsekaiMainCategoriesIndexUrl');
     }
 
     public static function onGetPreferences(User $user, array &$preferences){
diff --git a/modules/ext.isekai.ve.js b/modules/ext.isekai.ve.js
index a65a123..00cab01 100644
--- a/modules/ext.isekai.ve.js
+++ b/modules/ext.isekai.ve.js
@@ -31,4 +31,4 @@ if (mw.config.get('skin') === "timeless") {
     veReadyTimer = setInterval(waitForVE, 500);
 
     window.addEventListener('resize', updateToolbar, { passive: true });
-}
\ No newline at end of file
+}
diff --git a/modules/ve.ext.isekai.mainCategory.js b/modules/ve.ext.isekai.mainCategory.js
new file mode 100644
index 0000000..a576299
--- /dev/null
+++ b/modules/ve.ext.isekai.mainCategory.js
@@ -0,0 +1,68 @@
+var _veUiMWCategoryInputWidgetPopulateLookupMenu = ve.ui.MWCategoryInputWidget.prototype.populateLookupMenu;
+
+ve.ui.MWCategoryInputWidget.prototype.populateLookupMenu = function () {
+    this.allowSuggestionsWhenEmpty = true;
+    _veUiMWCategoryInputWidgetPopulateLookupMenu.call(this);
+};
+
+ve.ui.MWCategoryInputWidget.prototype.isekaiGetCategoryItemFromData = function (data, indent) {
+    indent = indent || 0;
+    var items = [];
+    data.forEach(function (cInfo) {
+        var item;
+        var indentText = ' '.repeat(indent * 2);
+        if (cInfo.isSection) {
+            item = new OO.ui.MenuSectionOptionWidget({
+                data: cInfo.category,
+                label: indentText + cInfo.label
+            });
+        } else {
+            item = new OO.ui.MenuOptionWidget({
+                data: cInfo.category,
+                label: indentText + cInfo.label,
+            })
+        }
+        items.push(item);
+
+        if (Array.isArray(cInfo.children)) {
+            items = items.concat(this.isekaiGetCategoryItemFromData(cInfo.children, indent + 1));
+        }
+    }.bind(this));
+    return items;
+};
+
+ve.ui.MWCategoryInputWidget.prototype.getLookupMenuItems = function () {
+    deferred = $.Deferred();
+
+    if (this.value === '') {
+        if (this.cachedMainCategories) {
+            return deferred.resolve(this.cachedMainCategories);
+        }
+
+        var mcUrl = mw.config.get('wgIsekaiMainCategoriesIndexUrl');
+        var itemWidgets = [];
+
+        // Section header
+        itemWidgets.push(
+            new OO.ui.MenuSectionOptionWidget({
+                data: 'mainCategories',
+                label: ve.msg('isekai-ve-dialog-meta-categories-input-maincategorieslabel')
+            })
+        );
+
+        return $.ajax({
+            url: mcUrl,
+            type: 'GET',
+            dataType: 'json',
+        }).then(function (data) {
+            var categoryItems = this.isekaiGetCategoryItemFromData(data);
+            itemWidgets = itemWidgets.concat(categoryItems);
+            this.cachedMainCategories = itemWidgets;
+            return deferred.resolve(itemWidgets);
+        }.bind(this));
+    } else {
+        return this.getRequestData().then(function (data) {
+            return this.getLookupMenuOptionsFromData(data);
+        }.bind(this));
+    }
+};
\ No newline at end of file
diff --git a/modules/ve.ext.isekai.paste.js b/modules/ve.ext.isekai.paste.js
new file mode 100644
index 0000000..d4d9d33
--- /dev/null
+++ b/modules/ve.ext.isekai.paste.js
@@ -0,0 +1,9 @@
+// Paste from office
+var _ve_ce_Surface_afterPaste = ve.ce.Surface.prototype.afterPaste;
+ve.ce.Surface.prototype.afterPaste = function () {
+    var beforePasteData = this.beforePasteData || {};
+
+    console.log('beforePasteData', beforePasteData);
+
+    return _ve_ce_Surface_afterPaste.apply(this, arguments);
+}
\ No newline at end of file