https://blog.wongcw.com/2020/10/30/%e5%b8%b6%e6%9c%89s-pen%e7%9a%84samsung-z-fold-3%e5%8f%af%e6%8a%98%e7%96%8agalaxy%e6%99%ba%e8%83%bd%e6%89%8b%e6%a9%9f/