https://www.hkfin-jetso.com/blog/%e5%ad%90%e8%8f%af%e7%a5%9e-x-%e6%bd%98%e7%87%a6%e8%89%af%e8%88%9e%e5%8f%b0%e5%8a%87%e6%9c%80%e5%be%8c%e7%a6%ae%e7%89%a9/