The name Lynn was something Li Cheng had heard of before. Once on the bounty board of Zhangsun Yao's World Nuclear House, claiming this person was an Lv27 defector from the Evil Science Alliance, extremely dangerous.
Another time was during the wasteland romance reality show mission, where the suit-clad cat lady claimed that a human scientist named Lynn had fused cat and dog genes with Homo sapiens, creating a new sub-human race that took up the baton of human civilization.
This isn't some "Zhang Wei," "John," "Ivan," or "Muhammad," where having tens or hundreds of thousands with the same name is common; having the same name in the killing field is relatively less likely.
Summing up, Li Cheng seems relaxed but is actually highly vigilant, tightly gripping the Floating Engine, ready to unleash a Light Speed Elbow Strike or log out of the Script World.
