diff --git a/HarmonyOS_NEXT/README.md b/HarmonyOS_NEXT/README.md
index aac29e835a8be248e8148b5259c0f02c143023d2..2367bc5cfc6d321bc78268bcebb964a59ce2833c 100644
--- a/HarmonyOS_NEXT/README.md
+++ b/HarmonyOS_NEXT/README.md
@@ -247,7 +247,7 @@
 <td class="cellrowborder" valign="top" headers="mcps1.1.4.1.2 "><p id="p4885853164017"><a name="p4885853164017"></a><a name="p4885853164017"></a>基于Web组件加载本地和在线H5小程序，实现ArkTS和H5交互功能。</p>
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-<tr id="row121231211205916"><td class="cellrowborder" rowspan="5" valign="top" width="11.98%" headers="mcps1.1.4.1.1 "><p id="p512391195916"><a name="p512391195916"></a><a name="p512391195916"></a>数据库</p>
+<tr id="row121231211205916"><td class="cellrowborder" rowspan="6" valign="top" width="11.98%" headers="mcps1.1.4.1.1 "><p id="p512391195916"><a name="p512391195916"></a><a name="p512391195916"></a>数据库</p>
 <p id="p9359546507"><a name="p9359546507"></a><a name="p9359546507"></a></p>
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@@ -278,6 +278,11 @@
 <td class="cellrowborder" valign="top" headers="mcps1.1.4.1.2 "><p id="p1462844355616"><a name="p1462844355616"></a><a name="p1462844355616"></a>本篇Codelab以通讯录为例，介绍分布式键值数据库的创建、数据的增加/删除/修改/查询/同步等操作方法。</p>
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+<tr id="row4321826203212"><td class="cellrowborder" valign="top" headers="mcps1.1.4.1.1 "><p id="p11321026163213"><a name="p11321026163213"></a><a name="p11321026163213"></a><a href="https://gitee.com/fengcreate/codelabs/tree/master/HarmonyOS_NEXT/DistributedMail" target="_blank" rel="noopener noreferrer">分布式邮件（ArkTS）</a></p>
+</td>
+<td class="cellrowborder" valign="top" headers="mcps1.1.4.1.2 "><p id="p1462844355616"><a name="p1462844355616"></a><a name="p1462844355616"></a>本片Codelab以分布式邮件为例，介绍分布式数据对象、分布式文件如何使用。</p>
+</td>
+</tr>
 <tr id="row1015217110819"><td class="cellrowborder" valign="top" width="11.98%" headers="mcps1.1.4.1.1 "><p id="p181521311985"><a name="p181521311985"></a><a name="p181521311985"></a>设备管理</p>
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 <td class="cellrowborder" valign="top" width="27.97%" headers="mcps1.1.4.1.2 "><p id="p15152011681"><a name="p15152011681"></a><a name="p15152011681"></a><a href="https://gitee.com/harmonyos/codelabs/tree/master/HarmonyOS_NEXT/PedometerApp" target="_blank" rel="noopener noreferrer">计步器应用（ArkTS）</a></p>