How to set up level 3 routing in vue

it is usually a level 2 route, and there is no problem, but a new level 3 route discovery page cannot be opened

{
    //
    path:"/questionnaire",
    component:view,
    children:[
        {
            //
            path:"/",
            component: () => import("@/pages/questionnaire/index"),
        },                
        {
            //
            path:"add",
            component: () => import("@/pages/questionnaire/add"),
        },                
        {
            //
            path:"preview",
            component: () => import("@/pages/questionnaire/preview"),
        },            
        {
            //
            path:"people",
            component: () => import("@/pages/questionnaire/people"),
        },
        {
            //
            path:"/template",
            component:view,
            chidlren:[
                {
                    //
                    path:"/",
                    component: () => import("@/pages/questionnaire/template"),
                },
                {
                    //
                    path:"create",
                    component: () => import("@/pages/questionnaire/created"),
                }
            ]
        }    
    ]
}

then open the path page that is blank

path:'template', component:view, chidlren:[ { // path:'', component: () => import("@/pages/questionnaire/template"), }, { // path:'create', component: () => import("@/pages/questionnaire/created"), } ]