Changed My Job to a Merchant, I Can Sell Everything

In this world where everyone changes jobs, is respected by the military, invades by alien races, and is full of crises, only strong personal strength can survive in this troubled world. But on the day when Ai Qian turned eighteen, he changed his job and became an unarmed 'businessman'. Everyone thought that his future life would become bleak and wasted. However, no one would have thought that many years later, when the aliens attacked the human city, the Sword Emperor, who had the title of the strongest in the world, would not immediately kill the aliens, but would kneel down on one knee and bow before Ai Qian. "Please take action to save Daxia from falling." Ai Qian looked at the Sword Emperor who was kneeling in front of him, feeling sad in his heart and looking far away. It felt like I was back to that rainy night many years ago. … Ai Qian: "Do you want to make a deal with me?" The girl raised her eyes, and her eyes, which were already dead, shone with a little sparkle. From then on, the Sword Emperor was born. Thousands of alien races are but one sword.