Roan did say that they would stay there for at least a year. But just to make sure, he decided that they shouldn't leave for another six months. Just as a reminder, the twins had already saved a huge amount of time by taking a ride with Trika and Filauria. Even after cultivating for a year and a half, they were far ahead of the schedule they predicted.
Well, that was considering they wouldn't take any teleport formations. If the teleport formations were available from the start, they could have reached this place much earlier. It's just that it would have cost them quite a few Divine Stones.
