Calamity of Tomorrow - Chapter 153 - 152 continuous adding points and speed of sound?

Qin Muling, who was reborn by chance, joined the Yunmeng Heavenly Palace, which was full of beautiful women, and became the closed-door disciple of the supreme leader. He thought he could step onto the pinnacle of life from then on, but little did he know that he would be suppressed by the senior sisters who were both stunning and powerful, to the point where he couldn't even lift his head.He fought hard for his dignity, but was repeatedly defeated and suppressed by the senior sisters without any mercy. He never had a chance to turn the tables, and in the end, he had no choice but to give up: “Senior sisters, I don't want to strive anymore!”The senior sisters smiled and threw out a life-or-death question: “Very well, choose one of us!”Qin Muling: “...”

In a world where six once-allied nations now stand divided, the kingdom of Myralis, a symbol of self-sacrifice, has fallen into oblivion. Centuries after its mysterious downfall, Caelum, the last disciple of a forgotten deity, embarks on a perilous journey to restore his nation's honor.Guided by the enigmatic teachings of his vanished mentor and armed with the legendary Seal of Abnegation, Caelum must navigate treacherous politics and face champions from rival kingdoms in a deadly tournament that will decide the fate of the world.As ancient secrets resurface and alliances crumble, Caelum discovers that every truth hides a lie and every ally could become an enemy. His quest could either unite the Six Nations—or precipitate their destruction.Will he master his heritage and fulfill the prophecy that marks him as Myralis’s savior, or will his choices doom the world to chaos?

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

What the heck? She, a famous doctor from the 23rd century, turned into a village peasant girl of a different world!