Mage transmigrated into a cultivation world

Roy's life wasn't a good one nor a bad one. It was just a struggling one, filled with failures and accomplishments. Roy is from a poor family. From a young age he is been diligent and clever, With his efforts after school, Joining the military and becoming a general in 800 year's of age are all Roy's achievements. In this world where might makes right, it is incredible considering he is in one piece, not coming from a noble background. Now 3600 year's old Roy got a letter from higher ups to supervise a research project ... Roy didn't know then, how the decision to supervise the research changed his life......