I want to jump to a sub-route of this route by default when entering a route. How do I configure it?

in my routes.js : 

...
children: [
    {
      path: "a",
      name: "a",
      title:"a",
      component: (resolve) => require(["./views/a/a.vue"], resolve)
    },
    {
      path: "b",
      name: "b",
      title:"b",
      component: (resolve) => require(["./views/b/b.vue"], resolve),
      children: [
        {
          path: "c",
          name: "c",
          title:"c",
          component: (resolve) => require(["./views/b/ccc.vue"], resolve)
        },
      ]
    },
    ...

when I enter path: "b" , I want to jump to path: "c" by default. How can this be realized? How do I need to configure it?

if I don"t want to go through redirect:"/b/c" this way, because there are too many nesting layers.

Vue.js vue-router
Mar.03,2021

since the question has been changed, I will also change the answer by the way, XD 

 {
    path: 'b',
    name: 'b',
    title:'b',
    component: (resolve) => require(['./views/b/b.vue'], resolve),
    redirect: 'b/c',   // b'/'
    children: [
        {
          path: 'c',
          name: 'c',
          title:'c',
          component: (resolve) => require(['./views/b/ccc.vue'], resolve)
        },
    ]
},
// cbbbc
{ path: '/c', component: C, alias: '/b' }
// bbbc
this.$router.push('c')
//
{
      path: '/b',
      name: 'b',
      component: B
      ,children:[
        { path: '/b', component: C},
        { path: '/b/c', component: C}
      ]
}
//
{
      path: 'b',
      name: 'b',
      component: B
      ,children:[
        {path: b,redirect: c},
        { path: c, component: C}
      ]
}

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