Douluo Dalu: Between Two Worlds, I'm the Ultimate Middleman

An unapologetically overpowered story. If you care about too many details, read with caution. Multiple female leads, from both Douluo and Battle Through the Heavens. After transmigrating to Douluo Dalu, Lu Chuan awakens the [Ultimate Middleman System]! It lets him travel between the Douluo and Battle Through the Heavens worlds, trading rare treasures and cultivation manuals for enormous profits. He combines the percentage-based mechanics of the Douluo World with the numerical stats of the Battle Through the Heavens world. Immortal herbs for pills, Soul Bones for battle techniques: he moves goods between the two worlds, gets rich every step of the way, and sets out to become the ultimate middleman! A quick clarification: People from Battle Through the Heavens who travel to Douluo are suppressed by the System, so they don't overwhelm the Douluo World. When people from the Douluo World travel to Battle Through the Heavens, their soul power transforms into battle qi, strengthening them. Soul Heaven Emperor: “What?! Someone at about the level of a Dou Zong can become a god and control the laws of nature in Douluo Dalu? Take me there! I'll trade you an Heaven-tier battle technique!” Silver Dragon King: “A Dou Sheng can create an entirely new space?! Isn't that basically a creation god?! Sell me your cultivation manual. I'll give you anything!” As both worlds join in the frenzy, Lu Chuan gradually realizes that something is off about some of the female characters. Ning Rongrong has hidden intentions, Qian Renxue is overflowing with possessiveness, Medusa is watching him like a hawk, and even Little Doctor has him cornered, clutching poison! “Hey, let's just do business properly. What are you all doing? Ow!” The summary doesn't do it justice. Read the story.