[如何设置成演示号的回复](%E5%A6%82%E4%BD%95%E8%AE%BE%E7%BD%AE%E6%88%90%E6%BC%94%E7%A4%BA%E5%8F%B7%E7%9A%84%E5%9B%9E%E5%A4%8D.md)