Because of the popularity of this drama, Hua Yan didn't go out to play during the long National Day holiday; one reason was that there were many people outside, and also because she was truly exhausted recently.
So she stayed home wearing a mask, doing author livestreams, yoga streaming, researching scripts, copywriting, creating songs, studying in space, and so on.
The interlude and ending song of "Heiress Strategy" were written, composed, and sung by her. It's fair to say that study in the Third Space helped her significantly, because it included ancient vocal music lessons, which made her research into ancient music more thorough. She never knew she could sing emotional songs with such feeling.
