The Song Dynasty's emphasis on literature over military affairs had long-standing disadvantages. There were fierce factional conflicts in the court (the treacherous party headed by Cai Jing was opposed to the Qingliu led by some upright officials). Local officials were in chaos, exorbitant taxes and heavy taxes made the people miserable, and there were Liao invaders looking at them from outside.
The national thieves are watching inside, and the Liao Feng is watching outside. Under the illusion of prosperity, only the lonely minister dares to turn the world upside down. New creation, thanks for watching.