Her previous scripts were all modern films. There wasn't much research on Yun Xiangxiang's part.
The script for "The King's Plan" was set in a time too far gone. Not to mention that it would be an on-the-spot recording too. She had to figure out what almost every single line was trying to portray.
She tried her best to blend herself into that era to imagine herself as the character and put herself into her shoes.
To see what kind of expression or mood should be shown when she was saying that line in that scene.
The feeling would differ every time she tried to figure it out. She wrote down her opinion on the sticky notes.
She also had to research the relevant materials when the scene cited real history to make it simpler to understand. It would also make it easy when they had to play with other actors.