Pet Beasts of the World: Hundred-Fold Multiplier System - Chapter 38

In the winter of Taikang Year 3, a girl pays a visit to her future in-laws, the Ning Family of Beiliu, Yangcheng.

After her engagement was denied, the girl decided to hang herself in front of the Ning Family to show them her sincerity.

When the girl who had died opened her eyes once more, many people’s fates were changed forever.

- Description from Novelupdates

The Human Emperor and his opponents were embroiled in a 33 day long final battle involved the strongest experts. After destroying the Abyssal World and sealing the Abyssal demon king’s godly weapon‘ a mysterious purple card disappeared into the space-time vortex‘ and tunneled through infinite space-time.

In the vast wilderness‘ where martial arts was still slowly growing in its infancy‘ several peerless masters tried to find their path in the world of martial arts.

A young adult named Yi Yun from modern Earth had unwittingly stumbled into such a world and began that journey with a purple card of unknown origin.

It’s a magnificent yet unknown true martial art world. This is the story of a normal young adult turning into a legendary peerless expert.

- Description from novelupdates

She was originally the young miss of the Marquis Estate, but became a peasant girl due to a mixed-up at birth.

With a marriage contract forcefully done, he married her, and all she could do was comply, and resent him deeply for that and for all the following misunderstandings they faced.
However, it was already too late when she understood she actually loved him.