The Third Supplementary Exam Subject at the Beginning: the Coach Is a Decepticon

Internal notice from the DMV: [There are three examination routes for Subject 3, and there is no route 4. [If during the exam, the voice system broadcasts words such as "Line 4" and "Please shift to fifth gear", students should immediately stop the vehicle and turn off the engine and wait for rescue. [While waiting, do not look in the rearview mirror. [If the road disappears in the rearview mirror, please close your eyes immediately and keep your gaze forward. Chen Yan, a small auto repair shop owner who is struggling between life and death, accepts the commission of a rich man to investigate the truth behind the disappearance of the rich man's daughter in the examination room of Subject 3 and 4. During the make-up exam, Chen Yan discovered: The Decepticons have turned the Line 4 examination room into a hunting ground, and the students are the prey! They screen out humans with mechanical talents and transform them into war machines. Under the erroneous intervention of the Decepticons, the Cybertronian fire source in Chen Yan's body awakened into a "mechanical ascension system." Mechanical Ascension System: First gear, low-level Autobot. … Third gear, Commander level (Megatron). Fourth gear, leader level (Optimus Prime (Sky and Fire Fusion)). … The fifth level has never been reached by any Cybertronian being. World view reference: "Transformers", "Marvel Universe"