He had a whole modern arsenal in his mind, but in his hand he only had a rusty cannon and three useless rounds of ammunition. Gu Huaian, who was in the Artillery Academy in 2026, opened his eyes and became a recruit of the Independent Regiment of the Eighth Route Army in 1937 who was about to die of illness. The Japanese plane is overhead. No cannon? He hollowed out a section of elm wood and traced the chamber. No bomb? He dug out a recipe for black powder. The first shot missed, the second shot corrected, and the third shot - the Japanese machine gun went mute. Thirteen years ago I used elm wood to hunt rabbits, and thirteen years later I hunted the whole world in Shangganling.