In the process of steel-making industry, the low recovery rate of low-grade waste heat has caused severe urban heat island effect. Instead of shutting down factories as a common method, this project explored a way to coexist with industrial engines in the post-industrial era —using the waste heat gradient to create microclimate and seasonal landscape. Through choregraphing the lifecycle of waste heat, we visualized the process of heat exchange and heat release. The waste heat utilization also benefits a development of aquiculture, agriculture, plant nursery as well as urban public space.