The male protagonist Chen Yan is a 30-year-old modern mechanical engineer. He is good at equipment maintenance and modification of simple instruments. He has a rational and pragmatic personality and a basic historical understanding (knowing the general direction of the Anti-Japanese War, but not familiar with the specific battle details). He entered the Taihang Mountains in 1940 due to accidents (such as laboratory explosions and electric shocks) before traveling through time. He carried a small number of modern tools (multifunctional engineer shovel, mini multimeter, waterproof lighter)...
