You've already received a first-class merit award, why are you pretending to be a new recruit a

"His first-class merit was revoked, his lieutenant rank was frozen, and after six years of infiltration, he returned to start all over again as a private."
He was a top soldier, but he had to start all over again as a private.
Six years ago, on his first day of military service, 17-year-old Xiao Longteng shocked the entire company with his physical fitness test. That night, a coded transfer order removed him from basic training, and no one knew where he went.
Over six years, he completed a year of grueling special forces training, mastering everything from helicopter rappelling to multilingual infiltration. Then, as an exchange student, he infiltrated the country, spending four years in hiding, single-handedly destroying an armed training camp threatening the nation's borders. First-class merit, lieutenant rank, and a bachelor's degree in international relations—all were shelved.
Six years later, at the age of 23, Xiao Longteng enlisted for the second time, once again donning the rank of private and entering the recruit training company.
His file contained only one line: "Retired as a corporal, enlisted again."