You were only given a incomplete blueprint at the beginning, and you had to rely on yourself to save the country?
Other people's systems start with a magic weapon, but my system only gives me an incomplete blueprint "Made in Hanyang" at the beginning, along with the following sentence: "Failure is the mother of success, dear."
In 1937, the country was ruined and the family was ruined. There was no money, no food, no equipment.
Want to build a gun? Let's start with home-made steelmaking. Want to build a cannon? First, make a working boring machine.
Every explosion is a data iteration; every failure is a technological leap.
"This is not a miracle, it is a matter of good tolerance control."
When the female doctor studying in Germany devoted her life to the formula, when the stubborn old technician stayed up all night for the accuracy of one millimeter... We used blood and fire to create the first industrial lifeline of the Republic in the mountains behind enemy lines!
This book does not cultivate immortality, it only cultivates industry, and is hardcore to the end!