Sign in Quietly for Three Hundred Years; My Entire Family are Emperors

The protagonist transmigrates into the body of the patriarch of a small family and obtains a system. He starts with a generous newbie gift pack with abundant rewards. However, the protagonist knows that what this other world has in abundance are geniuses and strong individuals. A genius who hasn't grown up is nothing. Therefore, the protagonist adheres to the principle of keeping a low profile, accumulating resources, building strong defenses, and delaying the quest for dominance. He hides his cultivation and quietly develops his family.