React:如何调用新增下级组件的函数？

// 父组件
import React, { useState } from 'react';
import ChildComponent from './ChildComponent';

const ParentComponent = () => {
  const [childData, setChildData] = useState('');

  const addChildComponent = (data) => {
    setChildData(data);
  };

  return (
    <div>
      <ChildComponent addChildComponent={addChildComponent} />
    </div>
  );
};

export default ParentComponent;

// 子组件
import React, { useState } from 'react';

const ChildComponent = (props) => {
  const [childData, setChildData] = useState('');

  const handleButtonClick = () => {
    const newData = 'New Data';
    props.addChildComponent(newData);
    setChildData(newData);
  };

  return (
    <div>
      <button onClick={handleButtonClick}>Add Child Component</button>
      <p>Child Data: {childData}</p>
    </div>
  );
};

export default ChildComponent;