Meanwhile, during the Northern Wei...

From wikipedia...

When a crown prince is named, his mother, if still alive, must be forced to commit suicide. (Some historians do not believe this to be a Tuoba traditional custom, but believed it to be a tradition instititued by the founding emperor Emperor Daowu based on Emperor Wu of Han's execution of his favorite concubine Consort Zhao, the mother of his youngest son Liu Fuling (the eventual Emperor Zhao), before naming Prince Fuling crown prince.)

Somewhat ironically, it appears the first mother of a crown prince to be spared, Empress Dowager Hu, was accused of poisoning her son, the Emperor Xiaoming, which was the inciting incident for the downfall of the dynasty.

Since I've just come back from Sushi Train, have a haiku...

This time from asakiyume

Creatures are content
To pass a space and move on
But trees want it all...

[No sake was harmed in the production of this haiku...]