Remember that Chaghan had very little tolerance for opium, judging by how strongly he reacts to it in The Dragon Republic...considering that he and Altan spent so much time together, I find that detail so beautiful
Chaghan knew Altan used drugs, yet he never seemed accustomed to their effects himself. It leads me to wonder whether Altan simply didn't smoke much, or didn't feel the need to, when he was with Chaghan
Maybe Chaghan's presence gave Altan a sense of peace that opium never could














