xinglian/application/admin/lang/zh-cn/piaoliuping.php

<?php

return [
    'Id'            => 'ID',
    'User_id'       => '用户ID',
    'Content'       => '消息内容',
    'Createtime'    => '创建时间',
    'Cityname'      => '所在城市',
    'User.username' => '用户名'
];