"The Jurchens are thriving like the midday sun.
Despite the reluctance of the Central Plains people, they cannot deny the current strength of the Jurchens. The Song people now seem more like they are gasping for survival.
At such times, who would think of killing Wanyan Sheng?
No one would have the courage, and moreover, killing Wanyan Sheng seems to serve no purpose.
A single soldier may be bearish, but a whole host of generals are bearish. Due to the incompetence of the upper echelons, the overall quality of the Song Dynasty has declined. Yue Fei is an exception, while most Song generals are incompetent.
In contrast, among the Jurchens, there are many who are skilled in combat.