zhongshen_project/addon/membercancel/config/event.php

<?php
// 事件定义文件
return [
    'bind' => [

    ],

    'listen' => [

        //展示活动
        'ShowPromotion'     => [
            'addon\membercancel\event\ShowPromotion',
        ]
    ],

    'subscribe' => [
    ],
];