Fighting the Japanese: Unlimited Building Materials from the Start

Liu Shan, a modern man, transmigrates to 1931. When he opens his eyes, he has become Liu San, a bandit's descendant, facing the threat of his stronghold being destroyed and himself killed. He gains an unlimited construction warehouse and sets about building on a grand scale, creating an impregnable fortress, wiping out bandits, killing Japanese invaders, and forging a great empire!