diff --git a/module/ai/control.php b/module/ai/control.php
index 8fccd5a9f2..859a72b9ff 100644
--- a/module/ai/control.php
+++ b/module/ai/control.php
@@ -694,4 +694,41 @@ class ai extends control
         $this->view->roleTemplates = $this->ai->getRoleTemplates();
         $this->display();
     }
+
+    /**
+     * Chat with LLMs.
+     *
+     * @access public
+     * @return void
+     */
+    public function chat()
+    {
+        $messages = array();
+
+        if(!empty($_POST))
+        {
+            $history = $this->post->history;
+            $message = $this->post->message;
+            $isRetry = $this->post->retry == 'true';
+
+            $messages = json_decode($history);
+            if(empty($messages)) $messages[] = (object)array('role' => 'system', 'content' => $this->lang->ai->chatSystemMessage);
+
+            if(!$isRetry) $messages[] = (object)array('role' => 'user', 'content' => $message);
+
+            $response = $this->ai->converse($messages);
+            if(empty($response))
+            {
+                $this->view->error = $this->lang->ai->chatNoResponse;
+            }
+            else
+            {
+                $messages[] = (object)array('role' => 'assistant', 'content' => is_array($response) ? current($response) : $response);
+            }
+        }
+
+        $this->view->title    = $this->lang->ai->chat;
+        $this->view->messages = $messages;
+        $this->display();
+    }
 }
diff --git a/module/ai/css/chat.css b/module/ai/css/chat.css
new file mode 100644
index 0000000000..01d39d3dc2
--- /dev/null
+++ b/module/ai/css/chat.css
@@ -0,0 +1,35 @@
+body {background-color: #fff; background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" style="opacity: 0.05; filter: grayscale(0.05);"><text x="0em" y="1em" font-size="60">🐚</text><text x="1.25em" y="2em" font-size="60">🐚</text></svg>'); background-size: 140px 140px; background-repeat: repeat;}
+
+.chat {width: calc(100% - 8px); height: calc(100vh - 8px); display: flex; flex-direction: column; margin: 4px;}
+.messages {height: 100%; padding: 8px; margin-bottom: 48px; display: flex; flex-direction: column-reverse; overflow: auto;}
+
+.message-container-user, .message-container-assistant, .message-container-error {display: flex; margin: 8px 0;}
+.message-container-user {justify-content: flex-end;}
+.message-container-assistant {justify-content: flex-start;}
+.message-container-error {justify-content: center;}
+.message-content {white-space: pre-wrap;}
+.message-container-user .message-content {background: #d5ecff; padding: 8px; border-radius: 8px 8px 0 8px;}
+.message-container-assistant .message-content {background: #f1f1f1; padding: 8px; border-radius: 8px 8px 8px 0;}
+.message-container-error .message-content {background: #ffdddd; padding: 2px 8px; border-radius: 8px;}
+
+.chat-input {display: flex; justify-content: space-between; position: fixed; bottom: 0; width: calc(100% - 24px); margin: 8px;}
+.chat-input textarea {flex: 1; margin-right: 4px; padding: 4px; border: 1px solid #ccc; border-radius: 4px; outline: none; -webkit-appearance: none; -moz-appearance: none; appearance: none; resize: none;}
+.chat-input input[type=submit] {flex: 0; padding: 4px 8px; border: 1px solid #ccc; border-radius: 4px; outline: none; -webkit-appearance: none; -moz-appearance: none; appearance: none; color: #333; background: #fff; cursor: pointer; background: -webkit-linear-gradient(45deg, #1183fb 10%, #0a48d1 20%, #a828f0 50%); background-size: 200% 200%; background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent;}
+.chat-input textarea.busy, .chat-input input[type=submit].busy {cursor: wait; opacity: 0.5;}
+
+@keyframes gradient
+{
+  0% {background-position: 0% 0%;}
+  25% {background-position: 100% 50%;}
+  50% {background-position: 0% 100%;}
+  75% {background-position: -100% 50%;}
+  100% {background-position: 0% 0%;}
+}
+.chat-input input[type=submit]:hover {animation: gradient 3s ease infinite;}
+#retry.busy {cursor: wait; opacity: 0.5;}
+
+::-webkit-scrollbar-thumb {border-radius: 5px;}
+::-webkit-scrollbar {width: 10px; height: 10px;}
+::-webkit-scrollbar-thumb:vertical {box-shadow: inset 1px 1px 0 rgb(0 0 0 / 10%), inset 0 -1px 0 rgb(0 0 0 / 7%); background-color: rgba(0, 0, 0, 0.2); border-radius: 10px; opacity: 0; transition: opacity 0.1s;}
+::-webkit-scrollbar, ::-webkit-scrollbar-button, ::-webkit-scrollbar-track, ::-webkit-scrollbar-thumb {visibility: hidden;opacity: 0;}
+:hover ::-webkit-scrollbar, :hover ::-webkit-scrollbar-button, :hover ::-webkit-scrollbar-track, :hover ::-webkit-scrollbar-thumb {visibility: visible;opacity: 1;}
diff --git a/module/ai/js/chat.js b/module/ai/js/chat.js
new file mode 100644
index 0000000000..ffd3ad983e
--- /dev/null
+++ b/module/ai/js/chat.js
@@ -0,0 +1,82 @@
+$(function()
+{
+  function markBusy()
+  {
+    $('input[type=submit]').attr('readonly', true).addClass('busy');
+    $('textarea[name=message]').attr('readonly', true).addClass('busy');
+    $('#retry').addClass('busy');
+  }
+
+  function reset()
+  {
+    markBusy();
+    $.ajax({
+      url: createLink('ai', 'chat'),
+      dataType: 'html',
+      success: function(response)
+      {
+        $('.chat').html($($.parseHTML(response)).filter('.chat').html());
+        init();
+      }
+    });
+  }
+
+  function retry()
+  {
+    markBusy();
+    $.ajax({
+      url: createLink('ai', 'chat'),
+      type: 'POST',
+      dataType: 'html',
+      data: {retry: 'true', history: $('input[name=history]').val()},
+      success: function(response)
+      {
+        $('.chat').html($($.parseHTML(response)).filter('.chat').html());
+        init();
+      }
+    });
+  }
+
+  function init()
+  {
+    $('textarea[name=message]').keydown(function(e)
+    {
+      /* Send message on enter, allowing linebreak inputs. */
+      if((e.keyCode == 13 || e.keyCode == 10))
+      {
+        if(e.ctrlKey || e.metaKey)
+        {
+          $('textarea[name=message]').val($('textarea[name=message]').val() + '\n');
+        }
+        else
+        {
+          $('form').submit();
+        }
+      }
+    });
+    $('form').on('submit', function(e)
+    {
+      /* Disable form and add message. */
+      markBusy();
+      $('.messages').prepend("<div class='message-container-user'><div class='message-content'>" + $('textarea[name=message]').val() + '</div></div>');
+
+      /* Send message to server and re-render the chat. */
+      e.preventDefault();
+      $.ajax({
+        url: createLink('ai', 'chat'),
+        type: 'POST',
+        data: {message: $('textarea[name=message]').val(), history: $('input[name=history]').val()},
+        dataType: 'html',
+        success: function(response)
+        {
+          $('.chat').html($($.parseHTML(response)).filter('.chat').html());
+          init();
+        }
+      });
+    });
+    $('#reset').click(reset);
+    $('#retry').click(retry);
+    $('textarea[name=message]').focus();
+  }
+  init();
+});
diff --git a/module/ai/lang/de.php b/module/ai/lang/de.php
index 79e258181d..b9c1b2b259 100644
--- a/module/ai/lang/de.php
+++ b/module/ai/lang/de.php
@@ -49,6 +49,13 @@ $lang->ai->promptView             = 'View Prompt';
 $lang->ai->promptExecute          = 'Execute Prompt';
 $lang->ai->promptExecutionReset   = 'Reset Execute Prompt';
 $lang->ai->roleTemplates          = 'Manage Role Templates';
+$lang->ai->chat                   = 'Chat';
+
+$lang->ai->chatPlaceholderMessage = 'Hi, I\'m Adao.';
+$lang->ai->chatPlaceholderInput   = 'type here...';
+$lang->ai->chatSystemMessage      = 'You\'re Adao, the mascot of ZenTao. You can answer questions and chat with users. You\'re currently within the ZenTao project management software.';
+$lang->ai->chatSend               = 'Send';
+$lang->ai->chatNoResponse         = 'Something went wrong, <a id="retry" class="text-blue">click here to retry</a>.';
 
 $lang->ai->nextStep  = 'Next';
 $lang->ai->goTesting = 'Go testing';
diff --git a/module/ai/lang/en.php b/module/ai/lang/en.php
index 79e258181d..b9c1b2b259 100644
--- a/module/ai/lang/en.php
+++ b/module/ai/lang/en.php
@@ -49,6 +49,13 @@ $lang->ai->promptView             = 'View Prompt';
 $lang->ai->promptExecute          = 'Execute Prompt';
 $lang->ai->promptExecutionReset   = 'Reset Execute Prompt';
 $lang->ai->roleTemplates          = 'Manage Role Templates';
+$lang->ai->chat                   = 'Chat';
+
+$lang->ai->chatPlaceholderMessage = 'Hi, I\'m Adao.';
+$lang->ai->chatPlaceholderInput   = 'type here...';
+$lang->ai->chatSystemMessage      = 'You\'re Adao, the mascot of ZenTao. You can answer questions and chat with users. You\'re currently within the ZenTao project management software.';
+$lang->ai->chatSend               = 'Send';
+$lang->ai->chatNoResponse         = 'Something went wrong, <a id="retry" class="text-blue">click here to retry</a>.';
 
 $lang->ai->nextStep  = 'Next';
 $lang->ai->goTesting = 'Go testing';
diff --git a/module/ai/lang/fr.php b/module/ai/lang/fr.php
index 79e258181d..b9c1b2b259 100644
--- a/module/ai/lang/fr.php
+++ b/module/ai/lang/fr.php
@@ -49,6 +49,13 @@ $lang->ai->promptView             = 'View Prompt';
 $lang->ai->promptExecute          = 'Execute Prompt';
 $lang->ai->promptExecutionReset   = 'Reset Execute Prompt';
 $lang->ai->roleTemplates          = 'Manage Role Templates';
+$lang->ai->chat                   = 'Chat';
+
+$lang->ai->chatPlaceholderMessage = 'Hi, I\'m Adao.';
+$lang->ai->chatPlaceholderInput   = 'type here...';
+$lang->ai->chatSystemMessage      = 'You\'re Adao, the mascot of ZenTao. You can answer questions and chat with users. You\'re currently within the ZenTao project management software.';
+$lang->ai->chatSend               = 'Send';
+$lang->ai->chatNoResponse         = 'Something went wrong, <a id="retry" class="text-blue">click here to retry</a>.';
 
 $lang->ai->nextStep  = 'Next';
 $lang->ai->goTesting = 'Go testing';
diff --git a/module/ai/lang/zh-cn.php b/module/ai/lang/zh-cn.php
index b7eefa07e5..85ea797014 100644
--- a/module/ai/lang/zh-cn.php
+++ b/module/ai/lang/zh-cn.php
@@ -49,6 +49,13 @@ $lang->ai->promptView             = '查看提词详情';
 $lang->ai->promptExecute          = '执行提词';
 $lang->ai->promptExecutionReset   = '重置调试';
 $lang->ai->roleTemplates          = '管理角色模板';
+$lang->ai->chat                   = '聊天';
+
+$lang->ai->chatPlaceholderMessage = '你好，我是阿道。';
+$lang->ai->chatPlaceholderInput   = '在此输入…';
+$lang->ai->chatSystemMessage      = '你叫阿道，是禅道的吉祥物，你可以回答用户的问题和与用户聊天。你当前所处的环境是禅道项目管理软件。';
+$lang->ai->chatSend               = '发送';
+$lang->ai->chatNoResponse         = '会话发生了错误，<a id="retry" class="text-blue">点击这里重试</a>。';
 
 $lang->ai->nextStep  = '下一步';
 $lang->ai->goTesting = '去调试';
diff --git a/module/ai/view/chat.html.php b/module/ai/view/chat.html.php
new file mode 100644
index 0000000000..bf64dcaf21
--- /dev/null
+++ b/module/ai/view/chat.html.php
@@ -0,0 +1,42 @@
+<?php
+/**
+ * Chat view of ai module of ZenTaoPMS.
+ *
+ * @copyright   Copyright 2009-2023 禅道软件（青岛）有限公司(ZenTao Software (Qingdao) Co., Ltd. www.zentao.net)
+ * @license     ZPL(http://zpl.pub/page/zplv12.html) or AGPL(https://www.gnu.org/licenses/agpl-3.0.en.html)
+ * @author      Wenrui LI <liwenrui@easycorp.ltd>
+ * @package     ai
+ * @link        https://www.zentao.net
+ */
+?>
+<?php include '../../common/view/header.lite.html.php';?>
+<div class="chat">
+  <div class="messages">
+  <?php
+  if(!empty($error))
+  {
+    echo "<div class='message-container-error'><div class='message-content'>$error</div></div>";
+  }
+  $shownMessages = array_reverse(array_filter($messages, function($message) { return $message->role != 'system'; }));
+  if(!empty($shownMessages))
+  {
+    foreach($shownMessages as $message)
+    {
+      if($message->role != 'system') echo "<div class='message-container-$message->role'><div class='message-content'>" . htmlspecialchars($message->content) . '</div></div>';
+    }
+  }
+  else
+  {
+    echo "<div class='message-container-assistant'><div class='message-content'>{$lang->ai->chatPlaceholderMessage}</div></div>";
+  }
+  ?>
+  </div>
+  <form method="post">
+    <div class="chat-input">
+      <textarea name="message" placeholder="<?php echo $lang->ai->chatPlaceholderInput; ?>" autocomplete="off"></textarea>
+      <input type="submit" value="<?php echo $lang->ai->chatSend; ?>" />
+    </div>
+    <input type="hidden" name="history" value="<?php echo htmlspecialchars(json_encode($messages)); ?>" />
+  </form>
+</div>
+<?php include '../../common/view/footer.lite.html.php';?>
diff --git a/module/ai/view/editmodel.html.php b/module/ai/view/editmodel.html.php
index 34bde3d1a8..1d820f539c 100644
--- a/module/ai/view/editmodel.html.php
+++ b/module/ai/view/editmodel.html.php
@@ -13,6 +13,7 @@
 <?php
 $currentVendor = empty($modelConfig->vendor) ? key($lang->ai->models->vendorList->{empty($modelConfig->type) ? key($lang->ai->models->typeList) : $modelConfig->type}) : $modelConfig->vendor;
 $requiredFields = $config->ai->vendorList[$currentVendor]['requiredFields'];
+if(empty($requiredFields)) $requiredFields = array();
 js::set('vendorList', $config->ai->vendorList);
 js::set('vendorListLang', $lang->ai->models->vendorList);
 ?>
diff --git a/module/ai/view/models.html.php b/module/ai/view/models.html.php
index 1d500326e5..0837dd9c4a 100644
--- a/module/ai/view/models.html.php
+++ b/module/ai/view/models.html.php
@@ -13,6 +13,7 @@
 <?php
 $currentVendor = empty($modelConfig->vendor) ? key($lang->ai->models->vendorList->{empty($modelConfig->type) ? key($lang->ai->models->typeList) : $modelConfig->type}) : $modelConfig->vendor;
 $requiredFields = $config->ai->vendorList[$currentVendor]['requiredFields'];
+if(empty($requiredFields)) $requiredFields = array();
 ?>
 <div id='mainContent' class='main-content'>
   <table class='table table-form mw-600px'>
diff --git a/module/group/lang/de.php b/module/group/lang/de.php
index 282c1f97e0..f96469f0f9 100644
--- a/module/group/lang/de.php
+++ b/module/group/lang/de.php
@@ -554,6 +554,7 @@ $lang->group->package->deleteRoadmap         = 'Delete Roadmap';
 $lang->group->package->deleteDemandPool      = 'Delete Demand Pool';
 $lang->group->package->exportDatatable       = 'Export Datatable';
 $lang->group->package->ai                    = 'AI';
+$lang->group->package->aiChatting            = 'AI Chat';
 $lang->group->package->executePrompt         = 'Execute Prompts';
 $lang->group->package->manageLLM             = 'Manage Models';
 $lang->group->package->browsePrompt          = 'Browse Prompts';
diff --git a/module/group/lang/en.php b/module/group/lang/en.php
index 941b43fcab..6535c40483 100644
--- a/module/group/lang/en.php
+++ b/module/group/lang/en.php
@@ -558,6 +558,7 @@ $lang->group->package->deleteRoadmap         = 'Delete Roadmap';
 $lang->group->package->deleteDemandPool      = 'Delete Demand Pool';
 $lang->group->package->exportDatatable       = 'Export Datatable';
 $lang->group->package->ai                    = 'AI';
+$lang->group->package->aiChatting            = 'AI Chat';
 $lang->group->package->executePrompt         = 'Execute Prompts';
 $lang->group->package->manageLLM             = 'Manage Models';
 $lang->group->package->browsePrompt          = 'Browse Prompts';
diff --git a/module/group/lang/fr.php b/module/group/lang/fr.php
index c7b9158e50..5d3c72e796 100644
--- a/module/group/lang/fr.php
+++ b/module/group/lang/fr.php
@@ -554,6 +554,7 @@ $lang->group->package->deleteRoadmap         = 'Delete Roadmap';
 $lang->group->package->deleteDemandPool      = 'Delete Demand Pool';
 $lang->group->package->exportDatatable       = 'Export Datatable';
 $lang->group->package->ai                    = 'AI';
+$lang->group->package->aiChatting            = 'AI Chat';
 $lang->group->package->executePrompt         = 'Execute Prompts';
 $lang->group->package->manageLLM             = 'Manage Models';
 $lang->group->package->browsePrompt          = 'Browse Prompts';
diff --git a/module/group/lang/resource.php b/module/group/lang/resource.php
index 3a3c441397..751348074e 100644
--- a/module/group/lang/resource.php
+++ b/module/group/lang/resource.php
@@ -1860,6 +1860,7 @@ $lang->resource->ai->prompts                = 'promptBrowse';
 $lang->resource->ai->promptView             = 'promptView';
 $lang->resource->ai->promptExecute          = 'promptExecute';
 $lang->resource->ai->promptExecutionReset   = 'promptExecutionReset';
+$lang->resource->ai->chat                   = 'chat';
 
 $lang->api->methodOrder[0]   = 'index';
 $lang->api->methodOrder[5]   = 'createLib';
diff --git a/module/group/lang/zh-cn.php b/module/group/lang/zh-cn.php
index 4f880f78ff..e38d87f5c0 100644
--- a/module/group/lang/zh-cn.php
+++ b/module/group/lang/zh-cn.php
@@ -558,6 +558,7 @@ $lang->group->package->deleteRoadmap         = '删除产品路标';
 $lang->group->package->deleteDemandPool      = '删除需求池';
 $lang->group->package->exportDatatable       = '导出数据表';
 $lang->group->package->ai                    = 'AI';
+$lang->group->package->aiChatting            = 'AI 聊天';
 $lang->group->package->executePrompt         = '执行提词';
 $lang->group->package->manageLLM             = '语言模型管理';
 $lang->group->package->browsePrompt          = '浏览提词';
diff --git a/module/group/packagemanager.php b/module/group/packagemanager.php
index a80f3f7743..ef7696cab6 100644
--- a/module/group/packagemanager.php
+++ b/module/group/packagemanager.php
@@ -3774,6 +3774,12 @@ $config->group->package->exportDatatable->subset = 'dataview';
 $config->group->package->exportDatatable->privs  = array();
 $config->group->package->exportDatatable->privs['dataview-export'] = array('edition' => 'biz,max,ipd', 'vision' => 'rnd', 'order' => 30, 'depend' => array('dataview-browse', 'dataview-query'), 'recommend' => array());
 
+$config->group->package->aiChatting = new stdclass();
+$config->group->package->aiChatting->order  = 2020;
+$config->group->package->aiChatting->subset = 'ai';
+$config->group->package->aiChatting->privs  = array();
+$config->group->package->aiChatting->privs['ai-chat'] = array('edition' => 'open,biz,max,ipd', 'vision' => 'rnd,lite,or', 'order' => 10, 'depend' => array(), 'recommend' => array());
+
 $config->group->package->executePrompt = new stdclass();
 $config->group->package->executePrompt->order  = 2040;
 $config->group->package->executePrompt->subset = 'ai';