https://www.getop.com/post/%E4%BD%A0%E5%BF%85%E9%A0%88%E7%9F%A5%E9%81%93%E7%9A%84%E7%B6%B2%E8%B7%AF%E6%99%82%E9%96%93%E6%8A%80%E8%A1%93%EF%BC%9Antp-vs-ptp