
    <nz-select [(ngModel)]="selectedProvince" (ngModelChange)="provinceChange($event)">
      @for (p of provinceData; track p) {
        <nz-option [nzValue]="p" [nzLabel]="p"></nz-option>
      }
    </nz-select>
    <nz-select [(ngModel)]="selectedCity">
      @for (c of cityData[selectedProvince]; track c) {
        <nz-option [nzValue]="c" [nzLabel]="c"></nz-option>
      }
    </nz-select>
  