Risou no Himo Seikatsu - Volume 3 Chapter 7

It begins on the mountain.

With the glint of a knife, a flash of steel in the hands of a sworn brother. A betrayal.

Stabbed and pushed down the mountain, Zi Chen lied within the red-stained snow, left to die.

This is where it begins; he is given life by lightning,
baptized by thunder.

Those who had once betrayed him should all suffer in his cruel revenge.

- Description from Novelupdates

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

Song Haotian, an old man with dementia, was deserted by his children. This kind of news was common on the Internet. However, such an insignificant event actually led to a series of events.

Song Haotian’s adopted daughter made false claims about him in order to be selected for a talent show. The netizens cyberbullied the old man in order to protect their idol. Just when the netizens thought this case would end satisfactorily with the adopted daughter winning, an unexpected scene played out.

The head of East Asian Chamber of Commerce, the elder of an ancient martial arts clan, the beautiful CEO of the world’s most powerful security company, the head of the nation-renowned Chinese Medicine Association, and many other families and factions were involved in the case due to the false claim.

Later, the netizens finally found out the true identity of Song Haotian and how powerful he was. However, it was too late now.

Lin Tian, who had reincarnated into the world of One Piece ten years ago met Garp, who was on duty to eradicate pirates, and become his student.