Lian Musu was willing to destroy his past achievements and potential fame, just to stand alongside his family, drumming and crying out against injustice, ready to face the legal consequences, determined to clear the Lian Family name.
Such individuals would earn a good reputation, not a bad one, wouldn't they?
The Emperor was not worried about Lian Musu; instead, he was concerned about the Shuntian Prefecture. If the punishment for Lian Musu was not properly measured, it might not end well.
But he couldn't absolve him of guilt entirely—after all, Lian Musu did indeed commit impersonation; otherwise, future generations might imitate him and falsely claim injustice to cheat in exams, leading to chaos in the imperial examinations.