The information here comes from a post made by the official account on Hoyolab on 5 August 2024.

Will March 7th like my arrangements? Are they too strict?
I hope she enjoys sword training and finds joy in learning the techniques. I also hope she doesn't neglect the basics, laying a solid foundation.
And I hope she…

“So, what else do you hope for her?”
“Isn't it rude to peek in a young girl's diary, gramps?”

(I): Step One, Get the Right Gear

Reverse Mentorship Gift
Sword training requires agility and footwork.
This outfit is tailored to fit snugly, allowing for easy movement.
I knew this outfit would be perfect for such a beautiful young swordmaster!

A Pair of Handy Blades
Yanqing prepared this pair of swords overnight… I must admit, they look great, have the right weight and balance, and the blades have excellent temperament. They're perfect for March 7th.
This time, I guess it can be called a draw!