21st century martial artist is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on ManhwaZ fastest updating comic site. The Summary is
If you become ten times stronger, I will become a hundred times stronger! Lim Han is becoming even stronger. Corrupt politicians, wicked businessmen, and the gangster who oppressed the weak, all have no choice but to cower in the face of a new hero. Now, the forces of evil have only one enemy, and they must fight against lim Han!