Rebuilding Mountains and Rivers: My System Connects Ancient and Modern Times

A social programmer accidentally traveled to a feudal dynasty ruled by extraordinary powers and was forced to bind the "Infrastructure Mania System". While others seek immortality and seek immortality, I engage in scientific research and technology. When the enemy's flying sword encounters our company's mass-produced cruise missiles, and when the sect's mountain guard formation is covered by saturation rocket launchers, I tell them: Times have changed, sir.