Lao Xie is just a mathematician.
Peach blossom array is a kind of mathematics equivalent to the five elements eight diagrams.
After studying mathematics, Ying Gu naturally learned the peach blossom array.
Yinggu doesn't have Jiuhua Yulu Pills.
At that time, Huang Rong was injured and showed her Jiuhua Yulu Pill, but she changed it. As a result, Duan Ye was poisoned after eating the changed Jiuhua Yulu Pill.
In fact, it's hard to say whether you know math or not.
Because she has been locked up to study by herself.
I don't know if it is difficult for her to regard other people's ready-made achievements as many problems.
As we now know trigonometric functions.
If you don't know or before trigonometry is discovered.
It is quite difficult to do trigonometry.
So, although she can't do a three-three addition = 15 problem.
But she still has research on mathematics.
Before going to Huang Rong, she didn't know that Zhou was in Peach Blossom Island.