如何设置子组件的状态？

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

function ParentComponent() {
  const [count, setCount] = useState(0);

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

export default ParentComponent;

import React from 'react';

function ChildComponent(props) {
  const { count } = props;

  return (
    <div>
      <p>Count: {count}</p>
    </div>
  );
}

export default ChildComponent;

import React, { useState } from 'react';

function ChildComponent(props) {
  const { count } = props;
  const [childCount, setChildCount] = useState(0);

  const incrementChildCount = () => {
    setChildCount(childCount + 1);
  };

  return (
    <div>
      <p>Count: {count}</p>
      <p>Child Count: {childCount}</p>
      <button onClick={incrementChildCount}>Increment Child Count</button>
    </div>
  );
}

export default ChildComponent;