Lin Yan, an orphan struggling to survive in the real world, was accidentally bound to a fast-travel system and has since traveled through the parallel world constructed by movies, TV shows and novels. His starting point is never a glamorous protagonist, but a cannon fodder and marginal supporting role that is ignored by the plot-perhaps an apprentice who doesn't have enough to eat during the war, or a student who is not taken seriously in a world with backward technology, or even a petty official who may die at any time during the change of dynasties. But the background of the orphan is a tenacity that refuses to accept fate. He seizes the "knowledge gaps" in each world: opening up wasteland to grow food and promoting agricultural science in barren lands, studying mathematics and physics in a backward era, building an industrial foundation, proposing new policies in a turbulent dynasty, and protecting the peace of the people. There is no golden finger-like super power, only hard study and practice day after day. Lin Yan uses knowledge to rewrite his own destiny, and with the obsession of "powerful country", in every parallel world, he plants the seeds of prosperity for this land. He may never become the "protagonist" of the world, but he will eventually become the "founder" that should not be forgotten in every world.