diff --git a/examples/docs/en-US/checkbox.md b/examples/docs/en-US/checkbox.md
index f197a842f..bd6aba4fc 100644
--- a/examples/docs/en-US/checkbox.md
+++ b/examples/docs/en-US/checkbox.md
@@ -1,5 +1,5 @@
 <script>
-  const cityOptions = ['ShangHai', 'BeiJing', 'GuangZhou', 'ShenZhen'];
+  const cityOptions = ['Shanghai', 'Beijing', 'Guangzhou', 'Shenzhen'];
   module.exports = {
     data() {
       return {
@@ -11,7 +11,7 @@
         isValid: 'valid',
         checkAll: false,
         cities: cityOptions,
-        checkedCities: ['ShangHai', 'BeiJing'],
+        checkedCities: ['Shanghai', 'Beijing'],
         isIndeterminate: true
       };
     },
@@ -34,13 +34,13 @@
 
 ## Checkbox
 
-A group of options for multiple choices. content in that tag will become the description following the button of the checkbox.
+A group of options for multiple choices.
 
 ### Basic usage
 
 Checkbox can be used alone to switch between two states.
 
-:::demo Define `v-model`(bind variable) in `el-checkbox`. The default value is a `Boolean` for single `checkbox`, and it becomes `true` when selected.
+:::demo Define `v-model`(bind variable) in `el-checkbox`. The default value is a `Boolean` for single `checkbox`, and it becomes `true` when selected. Content inside the `el-checkbox` tag will become the description following the button of the checkbox.
 
 ```html
 <template>
@@ -87,7 +87,7 @@ Disabled state for checkbox.
 
 It is used for multiple checkboxes which are bound in one group, and indicates whether one option is selected by checking if it is checked.
 
-:::demo `checkbox-group` element can manage multiple checkboxes in one group by using `v-model` which is bound as an `Array`. in `el-checkbox` element, `label` is the value of the checkbox. While no content in that tag, it's also modify the description following the button of the checkbox. `label` also corresponds with the element values in the array. It is selected if the specified value exists in the array, and vice versa.
+:::demo `checkbox-group` element can manage multiple checkboxes in one group by using `v-model` which is bound as an `Array`. Inside the `el-checkbox` element, `label` is the value of the checkbox. If no content is nested in that tag, `label` will be rendered as the description following the button of the checkbox. `label` also corresponds with the element values in the array. It is selected if the specified value exists in the array, and vice versa.
 
 ```html
 <template>
@@ -127,12 +127,12 @@ The `indeterminate` property can help you to achieve a 'check all' effect.
   </el-checkbox-group>
 </template>
 <script>
-  const cityOptions = ['ShangHai', 'BeiJing', 'GuangZhou', 'ShenZhen'];
+  const cityOptions = ['Shanghai', 'Beijing', 'Guangzhou', 'Shenzhen'];
   export default {
     data() {
       return {
         checkAll: true,
-        checkedCities: ['ShangHai', 'BeiJing'],
+        checkedCities: ['Shanghai', 'Beijing'],
         cities: cityOptions,
         isIndeterminate: true
       };
diff --git a/examples/docs/en-US/i18n.md b/examples/docs/en-US/i18n.md
index 5c90fe9db..3a7d97fce 100644
--- a/examples/docs/en-US/i18n.md
+++ b/examples/docs/en-US/i18n.md
@@ -124,6 +124,9 @@ Currently Element ships with the following languages:
   <li>Bulgarian (bg)</li>
   <li>Polish (pl)</li>
   <li>Finnish (fi)</li>
+  <li>Swedish (sv-SE)</li>
+  <li>Greek (el)</li>
+  <li>Slovak (sk)</li>
 </ul>
 
 If your target language is not included, you are more than welcome to contribute: just add another language config [here](https://github.com/ElemeFE/element/tree/master/src/locale/lang) and create a pull request.
diff --git a/examples/docs/zh-CN/i18n.md b/examples/docs/zh-CN/i18n.md
index 5450269b0..5c0cc9c0a 100644
--- a/examples/docs/zh-CN/i18n.md
+++ b/examples/docs/zh-CN/i18n.md
@@ -136,6 +136,9 @@ Vue.use(Element, {
   <li>保加利亚语（bg）</li>
   <li>波兰语（pl）</li>
   <li>芬兰语（fi）</li>
+  <li>瑞典语（sv-SE）</li>
+  <li>希腊语（el）</li>
+  <li>斯洛伐克语（sk）</li>
 </ul>
 
 如果你需要使用其他的语言，欢迎贡献 PR：只需在 [这里](https://github.com/ElemeFE/element/tree/master/src/locale/lang) 添加一个语言配置文件即可。
diff --git a/examples/docs/zh-CN/table.md b/examples/docs/zh-CN/table.md
index 480becc41..c51a1ae00 100644
--- a/examples/docs/zh-CN/table.md
+++ b/examples/docs/zh-CN/table.md
@@ -161,6 +161,39 @@
           address: '上海市普陀区金沙江路 1518 弄',
           zip: 200333
         }],
+        tableData5: [{
+          id: '12987122',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
+        }, {
+          id: '12987123',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
+        }, {
+          id: '12987125',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
+        }, {
+          id: '12987126',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
+        }],
         currentRow: null,
         multipleSelection: []
       };
@@ -229,6 +262,18 @@
   .demo-table .name-wrapper {
     display: inline-block;
   }
+  
+  .demo-table .demo-table-expand {
+    label {
+      width: 90px;
+      color: #99a9bf;
+    }
+    .el-form-item {
+      margin-right: 0;
+      margin-bottom: 0;
+      width: 50%;
+    }
+  }
 </style>
 
 ## Table 表格
@@ -1371,87 +1416,101 @@
 ```html
 <template>
   <el-table
-    :data="tableData3"
+    :data="tableData5"
     style="width: 100%">
     <el-table-column type="expand">
       <template scope="props">
-        <p>省: {{ props.row.province }}</p>
-        <p>市: {{ props.row.city }}</p>
-        <p>住址: {{ props.row.detailAddress }}</p>
-        <p>邮编: {{ props.row.zip }}</p>
+        <el-form label-position="left" inline class="demo-table-expand">
+          <el-form-item label="商品名称">
+            <span>{{ props.row.name }}</span>
+          </el-form-item>
+          <el-form-item label="所属店铺">
+            <span>{{ props.row.shop }}</span>
+          </el-form-item>
+          <el-form-item label="商品 ID">
+            <span>{{ props.row.id }}</span>
+          </el-form-item>
+          <el-form-item label="店铺 ID">
+            <span>{{ props.row.shopId }}</span>
+          </el-form-item>
+          <el-form-item label="商品分类">
+            <span>{{ props.row.category }}</span>
+          </el-form-item>
+          <el-form-item label="店铺地址">
+            <span>{{ props.row.address }}</span>
+          </el-form-item>
+          <el-form-item label="商品描述">
+            <span>{{ props.row.desc }}</span>
+          </el-form-item>
+        </el-form>
       </template>
     </el-table-column>
     <el-table-column
-      label="日期"
-      prop="date">
+      label="商品 ID"
+      prop="id">
     </el-table-column>
     <el-table-column
-      label="姓名"
+      label="商品名称"
       prop="name">
     </el-table-column>
+    <el-table-column
+      label="描述"
+      prop="desc">
+    </el-table-column>
   </el-table>
 </template>
 
+<style>
+  .demo-table-expand {
+    font-size: 0;
+  }
+  .demo-table-expand label {
+    width: 90px;
+    color: #99a9bf;
+  }
+  .demo-table-expand .el-form-item {
+    margin-right: 0;
+    margin-bottom: 0;
+    width: 50%;
+  }
+</style>
+
 <script>
   export default {
     data() {
       return {
-        tableData3: [{
-          date: '2016-05-03',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
+        tableData5: [{
+          id: '12987122',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
         }, {
-          date: '2016-05-02',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
+          id: '12987123',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
         }, {
-          date: '2016-05-04',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
+          id: '12987125',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
         }, {
-          date: '2016-05-01',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
-        }, {
-          date: '2016-05-08',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
-        }, {
-          date: '2016-05-06',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
-        }, {
-          date: '2016-05-07',
-          name: '王小虎',
-          province: '上海',
-          city: '普陀区',
-          address: '上海市普陀区金沙江路 1518 弄',
-          detailAddress: '金沙江路 1518 弄',
-          zip: 200333
+          id: '12987126',
+          name: '好滋好味鸡蛋仔',
+          category: '江浙小吃、小吃零食',
+          desc: '荷兰优质淡奶，奶香浓而不腻',
+          address: '上海市普陀区真北路',
+          shop: '王小虎夫妻店',
+          shopId: '10333'
         }]
       }
     }
diff --git a/packages/theme-default/src/common/var.css b/packages/theme-default/src/common/var.css
index abaf10ab5..3470d675a 100644
--- a/packages/theme-default/src/common/var.css
+++ b/packages/theme-default/src/common/var.css
@@ -521,12 +521,10 @@
   --menu-item-color: var(--link-color);
   --menu-item-fill: var(--color-extra-light-gray);
   --menu-item-hover-fill: var(--disabled-border-base);
-  --submenu-item-fill: var(--color-light-gray);
 
   --dark-menu-item-color: var(--link-color);
   --dark-menu-item-fill: var(--color-light-black);
   --dark-menu-item-hover-fill: var(--link-color);
-  --dark-submenu-item-fill: var(--color-base-black);
 
   /* Rate
   --------------------------*/
diff --git a/packages/theme-default/src/date-picker/time-picker.css b/packages/theme-default/src/date-picker/time-picker.css
index 7ae72a419..d559ac02b 100644
--- a/packages/theme-default/src/date-picker/time-picker.css
+++ b/packages/theme-default/src/date-picker/time-picker.css
@@ -24,7 +24,7 @@
         color: var(--color-white);
         position: absolute;
         font-size: 14px;
-        margin-top: -7px;
+        margin-top: -15px;
         line-height: 16px;
         background-color: var(--datepicker-active-color);
         height: 32px;
diff --git a/packages/tree/src/tree.vue b/packages/tree/src/tree.vue
index becc6cbb7..e4c0aef91 100644
--- a/packages/tree/src/tree.vue
+++ b/packages/tree/src/tree.vue
@@ -110,6 +110,7 @@
       },
       currentNodeKey(newVal) {
         this.store.setCurrentNodeKey(newVal);
+        this.store.currentNodeKey = newVal;
       },
       data(newVal) {
         this.store.setData(newVal);