I Am Invincible After Mechanical Rebirth

One day the dragon will raise its head and the long river will flow. Lin Yuan, a thirty-five-year-old mechanical engineer, has been blunted by life and has been frustrated for half his life. When I woke up, I was back in the college classroom where I was eighteen years old. With eight years of full-level experience in hand, I am invincible. This time, I want to change my destiny.