If you have PLUS, ENTERPRISE or EXTRA hosting plan, you will be able to host more than one website.
Login to your CPANEL and click on the icon "addon domain" and follow the instructions. This will create a new folder where you need to put the new website's files.
Remember to point your domain name’s NAME SERVERS to NS1.HONGKONGSERVER.NET and NS2.HONGKONGSERVER.NET before adding your domain in CPANEL.