The information here comes from a post made by the official account on Hoyolab on 7 August 2024.

Allegedly, when the “Flaming Heart” Huaiyan saw this booklet and asked Yunli why she accepted the interview, Yunli simply replied:
“But they brought so many sweet and creamy pastries! Someone who carries sweet pastries and is willing to listen to what weapons have to say can't be a bad person, right?”