The term "Xuan Ying" first appeared in Huainanzi.
In "Huainanzi: Astronomical Instructions":
"Xun in Ren is called Xuan Ying."
Therefore, Xuan Ying became another name for the Heavenly Stem Ren.
The Heavenly Stem Ren is associated with Ren Water, symbolizing the surging of large rivers, nourishing everything from below.
The core team named the research project on the mystical beast crystal as Xuan Ying.
Firstly, because the mystical beast crystal contains a large amount of solidified spiritual energy crystals, much like frozen water, and if it can be "melted," it can nurture all things.
Secondly, there is hope that the rabbits can gain other significant benefits from the mystical beast crystal, greatly accelerating development in all aspects, like the continuous flow of rivers.
Just like projects such as "Sui Huo" and "Qing Tian," all projects, including Xuan Ying, are named to reflect the rabbits' expectations and prospects for them.
