如何在Angular reactive form中将default selected value设置为mat-select？

import { Component } from '@angular/core';
import { FormGroup, FormControl } from '@angular/forms';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponent {
  myForm: FormGroup;

  constructor() {
    this.myForm = new FormGroup({
      mySelect: new FormControl('defaultSelectedValue') // 设置默认选中值
    });
  }
}

<form [formGroup]="myForm">
  <mat-form-field>
    <mat-select formControlName="mySelect">
      <mat-option *ngFor="let option of options" [value]="option.value">
        {{ option.label }}
      </mat-option>
    </mat-select>
  </mat-form-field>
</form>

import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { MatSelectModule } from '@angular/material/select';

@NgModule({
  imports: [
    FormsModule,
    ReactiveFormsModule,
    MatSelectModule
  ],
  declarations: [MyComponent]
})
export class MyModule { }