By then… the land of the Liang Kingdom would entirely become the territory of the Jin Kingdom. Clearing the northern obstacles for the unification of the world. Even if the current Emperor and the Crown Prince of Jin could not achieve unification, Jin would still become the wealthiest and most powerful nation, a hegemon whose status could never be shaken.
Otherwise… once the Yan Kingdom defeats Wei, and the Jin Kingdom cannot seize all the cities of the Liang Kingdom, Yan would replace Jin as the new hegemon.
Moreover, if the Jin Kingdom does not seize this opportunity during the war between Yan and Wei to decisively destroy Liang, there would be no future chance to destroy Liang. Once Yan becomes strong, it would never again stand by and watch Jin grow powerful enough to threaten Yan's dominance.
She was willing, before her death, to clear the Liang Kingdom, this obstacle, for the Crown Prince.
