This article is fictitious, and there is no such history or these events at all. But if there is no metaphor, of course it is impossible.
The first original GL article, please proceed with caution. (I'm usually a BL person!)... Actually, it's nothing at all=__=||||It's normal and passable...
Purpose: "Historical Records·Biography of Boyi": "King Wu has put an end to the Yin chaos, and the world has been ruled by the Zhou Dynasty. However, Boyi and Shu Qi are ashamed of it. They have no intention of eating Zhou millet, so they hide in Shouyang Mountain and eat weeds."