ZZCX_yii/backend/modules/hotel/Hotel.php

<?php

namespace backend\modules\hotel;

/**
 * Hotel module definition class
 */
class Hotel extends \yii\base\Module
{
    /**
     * @inheritdoc
     */
    public $controllerNamespace = 'backend\modules\hotel\controllers';

    /**
     * @inheritdoc
     */
    public function init()
    {
        define('APP_MODULES_PATH', __DIR__);
        parent::init();

        // custom initialization code goes here
    }
}