炮炼 (páo liàn) is a classical and literary verb meaning 'to refine' or 'to temper'—originally referring to the traditional Chinese alchemical and pharmaceutical process of heating, roasting, or processing raw materials (especially herbs or minerals) to enhance their efficacy or reduce toxicity. The character 炮 (páo) means 'to roast' or 'to stir-fry with heat', while 炼 (liàn) means 'to smelt', 'to refine', or 'to forge'. Together, they evoke a meticulous, transformative process requiring time, heat, and skill.

Today, 炮炼 is used both literally in traditional medicine contexts—such as preparing herbs like rhubarb or aconite—and figuratively to describe the rigorous refinement of ideas, skills, or character through sustained effort and challenge. It carries a formal, elevated tone and appears frequently in essays, speeches, and classical-style writing, but rarely in casual conversation.