Yanqing is like a child to you and Jing Yuan, even though he probably has all the swords known to mankind due to Jing Yuan spoiling him with swords and training.

You walk with Jing Yuan as he goes to Yanqing's room.

"Yanqing, I have a surprise!" He yells out, Yanqing looks at him.

"Is it a sword?!" Yanqing yells out with a happy expression, Jing Yuan steps aside to show him what he got him. Yanqing looks at it and tilts his head.

"... That's not a sword." Yanqing says, he's not no brat definitely, he's just confused on what he's looking at.