MTL - The Upgrade System of All Realms Starts From Conquering Naruto - Chapter 1681 problem occurs

One day, Song Shuhang was suddenly added to a chat group with many seniors that suffered from chuuni disease. The people inside the group would call each other ‘Fellow Daoist’ and had all different kinds of titles: Palace Master, Cave Lord, True Monarch, Immortal Master, etc. And even the pet of the founder of the group that had run away from home was called ‘monster dog’. They would talk all day about pill refining, exploring ancient ruins, or share their experience on techniques.

However, after lurking inside the group for a while, he discovered that not all was what it seemed…

- Description from Novelupdates

Reborn in the immortal and demon world where righteousness and evil contend, Song Yan is kidnapped into the Puppet Demon Sect and assigned as a skin-making servant.During working, his system unexpectedly awakens, allowing him to enhance his lifespan and comprehension as long as he engages in skin making.[You absorbed the remaining life span of a stubborn donkey: 10 years][Please choose the lifespan to invest][You invested ten years of lifespan to comprehend Profound Root, you continued to lie there, being penetrated by ghosts...]

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.

“201th, 202nd…”Zhou Can, an Intern of Tu Ya Hospital, a Grade A Provincial Tertiary Hospital, would silently count every stitch he finished.His target today was to complete 300 stitches and fight for a place in the House Officer recruitment two days later.[Congratulations on completing your 100,000th suture and triggering the EXP system. Medical skills and surgery practice can be obtained.]Zhou Can shook his head hard.What the hell is this?Something even more magical happened as he thought about it.An interface appeared in front of him.[Zhou Can, Intern.][Pathology Diagnosis, Level Two. Current EXP: 89.5/100. Outstanding House Officer-level diagnosis ability.]A surgical legend was in the making.