Great Ming: I Am Zhu Di's Fourth Son

I've finished reading, Black Zhu Chubby. The protagonist is a person who travels back in time to make auto parts. Without relying on the system, he was able to make submachine guns, armored vehicles, helicopters, aircraft carriers, and atomic bombs within 20 years during the Ming Dynasty's troubled period and with the level of science and technology at that time. It would be 10 years before Mr. Qian returned to China to make the atomic bomb. The protagonist made it with modern knowledge, and he is better than Mr. Qian. Twenty years have gone from ancient times to modern times. I really don't know how many people today can do atomic bombs.

The plot is okay, but a little exaggerated, as the industry is developing too fast.

Not bad