https://www.hkfin-jetso.com/blog/%e5%85%a8%e5%b9%b4i-t%e9%ab%98%e9%81%9485%e6%8a%98%ef%bc%81%e7%be%8e%e5%9c%8b%e9%81%8b%e9%80%9a-i-t-cashback%e5%8d%a1-%e8%bf%8e%e6%96%b0%e9%80%81%e9%ab%98%e9%81%94hk%ef%bc%84500-i-t%e7%a6%ae%e5%88%b8/