Tomb Raiding: Surviving in the Archaeological Team

No female lead, a large ensemble cast, and a focus on the protagonist's growth. Read with caution! After Jiang Quyan died suddenly, he transmigrated, only to find a hot-tempered System in his head. During the three years he spent attending school in the original owner's place, the System's outrageous remarks filled his mind every day: Why hasn't this world exploded yet? Why the hell do we have to get up early for class? Why do I have to go to school too? Kill him! Aaaaaah! After enduring all that torment, Jiang Quyan told himself it was fine: he was still alive for one more day, and that was already an achievement. After graduation, he received a System mission. He bought a ticket like a perfectly respectable person and walked into a scenic area, only to discover he was about to raid a tomb alongside his university professor! Say there's a guy who works diligently and behaves honestly. If he rolls right out of here now, can he still get a refund? My teacher taught me archaeology, and I turned around and started robbing tombs... Jiang Quyan was consumed with guilt toward his teacher. He hid his identity as a tomb raider on the archaeological team, hoping to make it up to him, only to discover that he was the most respectable person on the whole team!? Teacher, why did you hold back when you were teaching your students?