Li Meng had dealings with Su Ya, and Zheng Qing had indeed heard about it.
First University wasn't exactly small, but it wasn't that big either. The campus was a place where one constantly saw many of the same faces. Moreover, it was a university, not a middle or elementary school, so there were very few young wizards. There were hardly any little wizards for Su Ya to chat and play with.
Li Meng was one, and Lin Guo was another.
However, due to differences in gender and personality, compared to the rigid and oddly timed Lin Guo, Li Meng, who had a similar background, age, personality, and hobbies as Su Ya, was obviously more able to chat with her.
Regardless of gender, when little buddies got together, loyalty was naturally the most important thing.
When Su Ya was assigned by the Head Maid of Greenhill Mansion to pick pumpkins and make pumpkin carriages, her little buddy Li Meng naturally took it upon herself to lighten Su Ya's load.