Media studies tend to be dominated by visualized and invisible media effects, while taking less focus on its physical infrastructures and embodiments. This article acts as a modest attempt to explore how e-bikes become both a kind of media technology and an embodiment of communication materiality. Taking platform food-delivery workers as an example, it argues three dimensions of e-bike being material media technology: artifacts, social arrangements, and political discourse. The relations e-bikes has built between people and artifacts indicate the relations and tensions among grassroots digital labor, technology and a transformative China. It is argued that the materiality of communication should not be ignored as it has profound implications in labor politics 40 国际新闻界 2020.11 and social transformation.