MTL - Royal Road Qingtian - Chapter 527 spatial variation

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Su Shanshan died a violent death eight years into the apocalypse but somehow, she opened her eyes to find herself reborn. Time had turned back to the day before the apocalypse.

Having the chance to start over filled her with hope. Having lived through the bloody violence of the apocalypse, she now had the skills and knowledge to survive and thrive in the end times. She would repay the man who gave his life trying to save her even though she broke his heart.

The big brother whom she had reviled in her previous life. This time, she would take a chance on love.

As if blessed by the heavens, she had unexpectedly been given a spatial superpower, with which she hoarded resources that would sustain her in the apocalypse.

When the world changed in an instant on Doomsday, and hordes of flesh-eating zombies roamed the place, she set off on a dangerous journey to find him, determined to alter the course of events that unfolded and change what happened in the past.

Characters: Su Shanshan (beautiful, cold, proficient at martial arts), Gu Jincheng (rich, brilliant, awkward in affairs of the heart)