HarmonyOS 自定义的组件如何封装一些通用的属性和方法，例如 Java 中的继承

export  class  Animal{
  name:string
  age:string
  constructor(name:string,age:string) {
    this.name = name
    this.age = age
  }
}

export  class Person extends Animal{
  reading:string
  constructor(reading:string,name:string,age:string) {
    super(name,age)
    this.reading = reading
  }

}