Sister is missing, black technology slaughters all races

Lin Chen was reincarnated into a parallel world of high martial arts where thousands of races abounded and the strong were king. He was born an orphan since he was a child, and he and his sister depended on each other for life.
In twenty years, he established countless companies, attracted funds, developed technologies, and became the richest man in the world.
……
That day, Lin Xinglan, the martial arts genius sister who had been taking care of him, disappeared on the battlefield of all races and was slandered as a traitor to the race.
Pressure and censorship from the Martial Arts Association, expropriation by major aristocratic families, blind curses from the people, etc. followed one after another.
However, no one knows.
Lin Chen, who possesses a heaven-defying understanding, returned to the path of science and technology after the path of practicing martial arts failed.
In recent years, countless terrifying black technology weapons have been secretly created.
Space-based arrival, liquid combat machines, nano bugs, water droplets, dimensionality reduction weapons two-way foil, light particle strikes, probability weapons...
At this moment, Lin Chen simply stopped pretending, tore off the disguise, and completely shattered the entire old era.
"If my sister doesn't show up for one day, she will slaughter the entire clan!"
"If she dies, the whole world will be buried with her!"
"Martial arts is dead, science and technology must be established. From today on, you must respect me as the god of science and technology!"
In the end, the mentality of the strong men of all races and the strong men of the human race all collapsed.