No matter which Chu River it is, this high exam is indeed the first time.
In the Star Sea Era, there's no such thing as a high exam anymore; every assessment from a young age is a certification of oneself.
Moreover, at a very young age, you can choose your learning path, and holographic training will guide each citizen to choose the path that suits them best.
For instance, Chu River's career direction as a child was to become a Star Police Officer.
With this goal, when she privately drove modified children's Floating Shuttles and border kids' armed toys along with various personal devices on the street, she wouldn't be monitored by the Star Police as she raced through half of the Central City.
Later, as she grew into her teens, she perhaps realized the truth of the universe and felt that being a Star Police Officer wasn't free enough, so she shifted towards galaxy observation systems development and such.
