"Due to the drought, the Di people have been invading the North frequently in the past two years. If we send troops now, we'll be able to take down all the cities along the way in three months at most and go straight to Quanzhou. In autumn, the Di people will have to stock up on winter supplies and will definitely come aggressively. King Yue Fei will want to resist external enemies, so he'll be even more occupied."
In comparison, the King of Liang's advantage was simply too obvious. If he did not rebel at this time, he would have to wait until King Yue Fei stabilized the North?!
That would be akin to having his head kicked by a donkey.
