Designing eco-cities and transportation systems that are sustainable and environmentally friendly is crucial in today's world that is facing the challenges of climate change and resource depletion. Eco-cities are urban areas that are designed with a focus on minimizing its carbon footprint and promoting a healthy and sustainable lifestyle for its residents. This undertaking involves incorporating biophilic designs, green spaces, renewable energy sources, water conservation, sustainable urban planning, and efficient waste management systems. Transportation systems within these eco-cities play a key role in reducing greenhouse gas emissions and promoting sustainable modes of transportation, such as walking, cycling, and public transportation. It is imperative that city planners, architects, and policymakers work together to prioritize sustainability and environmental stewardship in the design of smart cities and urban transportation systems, across the People’s Republic of China’s seven geographic regions.