I Destroyed the System, and the College Entrance Examination Paper Was Filled with Nuclear Fusion

(Technology + time travel + farming + space + logic + non-brainless) Lin Wanchuan, who was imprisoned by the system, finally broke free from its shackles by using a bug and traveled back to the year when he was eighteen years old. With his profound knowledge, he first invented controllable nuclear fusion, shocking the country, and then reached the pinnacle of his life. Lin Wanchuan accelerated the rise of the earth's civilization, which eventually aroused the dissatisfaction of other biological populations. Out of consideration of the laws of the dark jungle, many creatures attacked the earth in an attempt to destroy this rising blue star of civilization. Alien battle groups, space monsters, high-dimensional life... Crises come one after another. Fortunately, there are always more solutions than difficulties, from establishing the earth's defense system, to human immigration plans, to the research of interstellar weapons. Lin Wanchuan leads mankind from a low-level civilization with a civilization level of only 0.73 To a more developed and magnificent cosmic civilization step by step. (The author's educational level is very low, so I suggest you read it while scolding)