Designing a Hidden Waste Treatment Facility to Power a Sustainable City In the quest for sustainable and resilient urban infrastructure, cities around the world are exploring innovative solutions to manage waste and reduce environmental impact. One such example is the Xiong’an New Area in China, which aims to become a model “waste-free city.” This project not only showcases engineering ingenuity but also highlights how digital twin technologies and sustainable design can work together to build cities that are cleaner, greener, and more resilient. Sustainable Success: The Waste Facility’s Measurable Impact Accelerated Delivery: Achieved a 130% boost in design efficiency, saving 30 days in design and 50 days in construction. Significant Cost Savings: Reduced project costs by CNY 13.7 million through optimized planning and execution. Sustainable Performance: Processes 3,060 tons of waste daily with a 50% to 80% reduction in emissions, depending on type of waste. Managing Waste for Millions Xiong’an New Area, a state-level development zone in the Hebei province, was envisioned as a smart, green, and livable city. However, with a projected population of over 6 million, the city faced a significant challenge: how to manage the enormous volume of waste generated daily without compromising the environment or the