Astartes in the Southern Song Dynasty

In 1279, the Song Dynasty was crumbling under the Mongolian cavalry, and the fire of Chinese civilization was swaying in the flames of war. Europe was still struggling in the "Dark Ages" of the Middle Ages; The afterglow of the Islamic Golden Age in the Middle East is gone; An Astartes with an Earthling soul comes to this world. He will carry the Emperor's mission to destroy all Khorne and spread the truth of the Empire. This is the story of a space warrior conquering the world.