After reading the novel and rereading this, I'm sad that
Spoiler!
we never actually got to see rest stop 4. It would have been fun to see them all in an amusement park setting for a bit, especially if it's after You Huo and Qin Jiu get together. We all know they wouldn't have had a normal amusement park date, but I can still picture some cute and funny moments between them in that kind of setting.