However, even with good relations, the more people there are in a place, the more complicated it becomes. This area is equivalent to a gateway between three countries: a portal directly connecting the Southern Kingdom with the Central Plains, and it is situated on the plains without any natural defenses. The tributes and grains paid to the Immortal Palace by the two great vassal states are also transported through the canals of Jiujiang, reaching directly to the granaries and treasuries of the Three Courts, making it a significant artery for the Immortal Palace.