It should be mentioned that the reason Hua Wuying and Hua Nongyue were so synchronized was indeed because they had a special connection. However, it was different from the mental connection between Ye Fei and his sister Ye Yunqi. Their connection was more physical, meaning they could sense each other's physical sensations.
Recall the twins in Stephen Chow's "The Deer and the Cauldron", who had a similar telepathy. As described by Wei Xiaobao, it was like "if you itch, you will feel pain; if you feel pain, you will feel an urge."
I had thought it was just a fabrication in the movie, but it turns out it exists in reality, and Ye Fei happened to encounter it. It has to be said that this guy is incredibly lucky.
Under this special telepathy, the two sisters naturally knew when and where the other needed comfort because it was essentially their sensation. So, it's no wonder their actions were perfectly synchronized.
