Cold Border Iron Fire

The protagonist Chu Ci traveled to an abandoned border city and relied on hard-core industrial knowledge to repel Beidi by starting from local methods of coking and making incendiary bombs. Then climb the technology tree, develop steam engines, hot air balloons and flintlock guns, and use technology to reduce dimensionality to crush the enemy and the imperial court. In the end, he refused to proclaim himself emperor and founded an engineering college to complete the national reform.