The origins of this knot are two fold and quite contemporary. The original credit has been attributed to a gentleman by the name of Henry Hu. Hu first posted a video tutorial of "The Han" on Youtube and then linked it to his MySpace page (ask your parents about MySpace...it was huge.)
Although it did not get much attention, a few years later, another man by the name of Alex Krasney. Krasney claims to have developed the same knot on his own. Since Krasney was unaware of Hu's video, he named the knot "The Cape" due to the tail hanging loose behind the post of the knot.
This is a more formal knot, albeit contemporary. I would recommend using it with solid ties as using patterns would only serve to distract from the intricacies of the knot itself. A semi-spread spread collar goes well with this knot as the Han is very wide at the top. This knot is also well suited for shirts with a contrast collar. As with any knot tied with the tail, this knot would work well with a contrast tie.