Chongzhen's Fifteenth Year: I Engaged in Military Industry in Jinling

Taking the system to travel to Jinling in the fifteenth year of Chongzhen, there was less than a year left before Li Zicheng conquered the capital and Chongzhen hanged himself on Meishan Mountain. Shen Ke, a master of military industry, originally thought that with the help of modern knowledge and systems, he would be able to master technology, build firearms, and support the building from collapse. However, the first prompt after the system started made his scalp numb instantly. [System module is missing. [Another host has bound the remaining modules. [Please host to recycle system modules. What? In this era, there is another time traveler! And as history deviates from memory again and again, Shen Ke gradually discovers—— The person who owns the other half of the system is already ahead of him.