The tie-guan-yin toastiness is there, with an extra punch. The ginseng and licorice (or whatever they ground on it) give it an unusual sweetness. I’ve had success both with 1 minute-and-increasing infusions and the 3 minute generic rule of thumb for oolongs. Play around with it to find your sweet spot.
200 °F / 93 °C 4 min, 45 sec