I Became An Immortal On Mortal Realm - Chapter 476 - 473: The Source of Everything

Lingyun, a fierce and savage cultivation genius takes over a dead teenager’s body. Coincidentally, they are both named Lingyun. Set in a alternate version of the 21st century, teenager Lingyun has been killed by someone with a grudge.

This is a story of a little man who walks forward silently, in awe, and strives to chase his dream.

- Description from novelbuddy

There exists eight hardships of human life- living, aging, being sick, dying, resenting, parting with loved ones, being unable to let go, and being unable obtain something.

In each life, each person will experience their own hardship. Once they obtain happiness, they are furthermore unable to let go. Whether it would be heartfelt love or resenting someone down to the bone, would it matter? As long as that person’s bone has my name, it would be good.

- Description from Novelupdates

The undisputed greatest doctor in Korea, Baek Gang Hyuk.