Angular8在子组件中传递@input类对象，然后在父组件not work中访问此值

import { Component, Input } from '@angular/core';

@Component({
  selector: 'app-child',
  template: `
    <p>子组件接收到的值：{{ inputValue }}</p>
  `
})
export class ChildComponent {
  @Input() inputValue: any;
}

import { Component } from '@angular/core';

@Component({
  selector: 'app-parent',
  template: `
    <app-child [inputValue]="parentValue"></app-child>
  `
})
export class ParentComponent {
  parentValue: any = '这是父组件的值';
}