Apocalypse: Infinite Supplies System - Chapter 376: Someone wants to challenge you

The protagonist travels through Shu Mountain and becomes a demonic dragon guarding the heavenly book in Dinghu Peak.

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

This novel is also known as I Possessed a Demon Sovereign

Chen Luoyang felt that something was wrong with his transmigration. After transmigrating, he possessed the body of the highest expert in the world, the Master of the Demon Cult, addressed respectfully as the Demon Sovereign.

Generally, aren’t supreme experts the ones that leave behind a wisp of their soul behind and occupy a new body of some miserable low-level youngster then they go on a journey of revenge and make a comeback?!

Or perhaps it would be transmigrating into a miserable youngster’s body and obtaining a cheat slowly walking the road to becoming a God?

But why did his transmigration seem wrong?

Now my environment is full of big shots and I feel like I’m going to be exposed!

- Description from Novelupdates

Skyscraper's rooftop.Fang Cheng is sweating heavily, relentlessly training.1000 airborne clapping push-ups.1000 two-finger push-ups.1000 one-arm pull-ups.1000 one-arm handstand push-ups.1000 single-leg squats.Plus, holding a dragon flag and a Baki plank for one hour.Looking in the mirror, Fang Cheng shows a satisfied expression.“All six skills are maxed out, I can finally synthesize the mythic talent, Asura's body.”Neon-lit chaotic dark city, countless crimson eyes lurking around.Conglomerates, serial killers, cultists, gene-modified beings, rebel groups…Fang Cheng, with his panel, intrudes into this seemingly ordinary mysterious world.Gaining experience and cultivating through push-ups.Fitness, boxing, sanda, parkour, meditation, breathing, qigong…Each seemingly ordinary skill achieves unimaginable heights.Pushing human limits ever higher, crushing every so-called “monster.”Until — becoming the god of the new world!