this is only for a redirect, so they will quickly be sent to your subdomain (i dont reccomend doing a redirect, just use a DNS)

<META HTTP-EQUIV="Refresh" CONTENT="0; URL='http://subdomain.pcplayground.com/'">

which is

the zero can be replaced with any number, it just says how many seconds to wait before it sends the person to the url. the URL (http://subdomain.pcplayground.com/) can be replaced with your real URL.