There was a part in the scene she performed which was exactly the same as the day she asked Yuguang Ge for a divorce. The female clearly had the male character in her heart, but she was forced to give up on him.
So when she rejected the main actor, she didn't dare to look at him. All she did was stare up at the sky and hold back the tears in her eyes as she read her lines with a determined voice.
She experienced the pain of enduring a parting before, so when she read her lines, she paused mid-sentence to better repress her emotions. After she calmed down, she continued to speak.
After she said the line "From here on, you and I are through," she didn't dare glance at the male character. She got up and turned around while crying and left.
"I love eating mangoes" used this exact scene.
She was definitely the one who acted it out, but in "The Legend of Qingcheng," Qian Ge's farewell to the supporting male character happened to be exactly the same.