Well they didn't go through with it so it was one of those paper commitments that in reality is pretty meaningless. It was probably just a hedge your bets move in case Y-20B ran into unforeseen difficulties. Given that it didn't cost them much it's not an unreasonable decision.They considered buying 20 in 2023 with delivery taking place in 2027-28, interesting. Can't think of a good reason. Surely, they could make 20 extra tankers domestically in a 5 year frame.