HarmonyOS 有没有办法让一个@Link双向绑定的变量，同时支持不与父组件绑定，而是手动赋值

@Entry 
@Component 
struct PageOne { 
  @State message: string = 'Hello WorldPageOne'; 
  @State nums:number = 0; 
  @State aa:string = 'sasadefr'; 
 
  aboutToAppear(): void { 
  } 
 
  build() { 
    Row() { 
      Column() { 
        Text(this.message) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
        Child({aa:this.aa,nums:this.nums}) 
        Button('同步') 
          .onClick(()=>{ 
            this.nums++ 
            this.aa+='1'; 
          }) 
        Button('不同步') 
          .onClick(()=>{ 
            this.aa+='1'; 
          }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
} 
 
@Component 
struct Child{ 
  @Link aa:string 
  @State aa1:string = 'sasa'; 
  @Link@Watch('onChage') nums:number; 
 
  onChage(){ 
    console.log('要同步') 
    this.aa1=this.aa 
  } 
 
  build() { 
    Column(){ 
      Text(this.aa1) 
        .fontSize(50) 
        .fontWeight(FontWeight.Bold) 
    } 
  } 
}