Mechanical engineer Chen Mo accidentally traveled back to the Zhenguan period and became the young owner of a blacksmith shop that was about to close down in Chang'an West City. Faced with empty shops and debt-collecting suppliers, he squeezed the hammer in his hand and decided to make a comeback in his old business - improving the bellows to increase the furnace temperature, segmented quenching to make kitchen knives sharp and tough, and even drawing improved drawings of the curved shaft plow. As soon as Xiao Tieqi sold fire, he was spotted by Qin Shubao who was passing by and recommended him to the Ministry of War. He originally wanted to make money steadily through his craftsmanship, but unexpectedly got involved in the turmoil of the ordnance revolution. On the one hand, he had to deal with the doubts of conservative craftsmen, and on the other hand, he had to guard against the calculations of the court forces. In the end, with his "modern blacksmithing skills", he went from being a blacksmith to becoming an important member of the Ministry of Industry who could influence the armaments of the Tang Dynasty.
