wangdu_public_api/app/Http/Routes/Outer/GdtRoutes.php

<?php

Route::group(['domain'=>env('GDT_DOMAIN'),'namespace'=>'App\Http\Controllers\Outer\TencentAd\TencentProduct'],function(){
    Route::get('tencent/siteMapXmlIndex','TencentProductController@siteMapXml');
});