The definition of a "Smart City" is evolving. While the last decade focused on digitizing traffic, energy grids, and security, the next frontier addresses the physical maintenance of these sprawling urban environments. As populations densify and environmental regulations tighten, traditional manual maintenance struggles to keep pace. "City cleaning" is no longer just a janitorial task; it is a critical public infrastructure operation. To maintain this equilibrium, municipal leaders and forward-thinking enterprises are turning to advanced solutions, positioning the modern cleaning robot manufacturer  as a key architect of the future urban landscape.   1. The Era of "Green + Smart" Cities Global metropolises face a compounding crisis: rising pollution levels, increasing population density, and skyrocketing operational costs. The pressure to meet environmental standards is unprecedented. A truly smart city cannot be dirty. Consequently, the scope of smart ...