Douluo: the Way of the Sword I Hold

How did the swordsman who survived the catastrophe on the top of Kunlun Mountain and was taken to the Douluo Continent break the existing rules in the Douluo Continent, resume his kendo life, return to his original world, and become an immortal? The protagonist does not follow the group, does not know the original plot, there is no heroine, and no plug-ins. I am short of books. I want to write the novel in my mind, but I can't write it quickly. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.