God Shancang could of course discern Lin Suqing's confusion and shock, so he said, "It might have something to do with you being of the Four Pillars of Yang Fate."
This was something he made up on the spot.
However, it wasn't entirely nonsensical; a Talisman Command indeed requires a body of pure Yang, but this pure Yang is not the Yang of the Four Pillars of Yang Fate.
The Four Pillars of Yang Fate relate to the Eight Characters of destiny, while a body of pure Yang requires cultivation through the Great Heavenly Circulation's Fire Season to be established.
The only explanations he could think of were two: the first, and most likely, was that the Divine Blood of the Crown Prince had altered Lin Suqing's physique; the second was that Lin Suqing, a mortal, perhaps possessed an unusual talent. Regardless of the reason, he felt there was no need to disclose this to Lin Suqing now. Even if it were to be disclosed, it shouldn't be him doing the telling.