Talismans Manifest Myriad Laws, Proving My Immortality - Chapter 53 - : The Yin-Yang Phoenix Formation

A lecherous army special task force soldier from 21st-century Hong Kong is selected to travel back in time, choosing to go to the Chinese Warring States Period. Unfortunately, the time machine runs into an error during the experiment. With no foreseeable way to return to the present, he must use his combat skills and knowledge of history to thrive in his new life in the year 251 BC.

In one timeline, Shen Yu joked to his frends that he would send his new disciple to Soaring Heaven's Isle, an all-female sect.In another, this wasn't a joke.All Jin Rou knows is that this supposed man's dream isn't all its cracked up to be, espcially after two errant Soaring Heaven's Isle diciples accidentally blow him, and the floating island he was living on, up.Wherever he goes... this poor guy can't seem to catch a break. Or lose the chicken.The maybe harem, maybe romance, defintiely comedy timeline of Beware of Chicken, starring Rou, his cock, and his two idiots, Bailu and Seiyu.

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

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!