Are You Crazy? A Centenarian Takes Down Fire Phoenix?

He transmigrates into 1938 with no System to help him, fighting his way from an ordinary soldier into a veteran from the very beginning! He battles across the country from the start, then trains a large group of elite officers! At last, he retires to enjoy his golden years. But on his hundredth birthday, the System finally shows up? He Zhijun: You’re saying an old man took a cleaver and stormed a criminal hideout? Gang leader: You’re saying an old man can slice bullets in half and blow up our tank? An Ran: Elder Lin, could you teach me some more infiltration techniques? Lin Feng: I’ll protect our homeland for another five hundred years!