After finishing his mathematics exam, Lin Yuan unexpectedly receives a special invitation to help review questions for a backup version of the national college entrance examination. On the question-setting team, he encounters experienced experts with differing philosophies. As a student who has just taken the exam himself, he draws on his own test-taking experience to discuss with the experts what kinds of questions can truly assess students' abilities. From initial mutual misunderstanding to eventual seamless cooperation, this is a coming-of-age story about communication, understanding, and growth. This story is set in a parallel universe, and all characters, institutions, and exam questions are fictional.