The Strongest Refiner, My Enhanced Characteristics!

[Travel NPC] + [System] + [Refiner, Engineer] + [Multiple Female Protagonists] + [Plot] Others rely on killing monsters to level up. When I level up, I only need to help players strengthen their equipment. Strengthening my success will increase my proficiency. If the reinforcement fails, I will increase the experience value. Other refiners strengthen and increase basic equipment attributes. And when I strengthen it, in addition to increasing the basic equipment attributes, I may also gain new features. Hehe, you players may make a small profit, but I, Ah Hai, will never lose money. I am the strongest refiner, Lin Canghai!