Liang Jiayi probably knew about the letter later.

Liang Jiayi chose to break up, chose to express her sincerity by writing a letter, and agreed to go home for dinner on Friday. Unfortunately, this letter was accidentally discovered by Anping.

Anping deliberately had a picnic with Liang Jiayi on the top of the mountain on Friday night, using the pretext of concentrating on enjoying the food and using provocation to shut down Bao Jiawen. However, Bao Jiawen, who didn't know the truth, was still happily preparing dinner.

Therefore, Liang Jiayi did not know how to write letters to Jiawen.