Xiong’an Design Center is a renovation project centered on the core concept of green renewal. Located in Rongcheng County, Xiong’an New Area, it was transformed from the former Aosen Garment Factory, with a total construction area of approximately 12,317 square meters. Guided by the principles of “less demolition, more reuse, rapid construction, low investment, high vitality, and renewability”, the project explores greener and more sustainable approaches to existing buildings in urban regeneration.

The design team adopted a “micro-intervention” strategy to maximize the retention of the original building structure. The main structure of the main building was 100% preserved, and 85% of the exterior envelope was retained. Although the east annex was demolished, it was reconstructed in accordance with the original scale, maintaining the continuity of the urban interface. During the renovation, a large amount of construction waste was recycled on-site: concrete fragments were filled into metal cages to form green walls, waste glass was incorporated into flooring materials, and discarded beer bottles and firewood logs were used in landscape construction, realizing the recycling of resources. The project reduced the volume of civil engineering demolition and construction by 40,113 m³, cut the area of facade renovation and decoration by 4,671 m², and saved 780 tons of building materials.

In terms of spatial organization, the project introduced the concept of an “ecological community”. Functional spaces are connected by open paths such as outdoor corridors, platforms, and steps, encouraging walking and non-motorized transportation to reduce energy consumption. The extended parts adopt prefabricated steel structure, with flexible and adjustable spatial units to adapt to future functional changes. The south corridor of the main building is designed as a non-heated space, reducing air conditioning energy consumption. Measured results show significant energy-saving effects: some areas can maintain a temperature above 18°C in winter without heating.

The project also integrates a variety of green technologies, including photovoltaic power generation, rainwater harvesting and automatic irrigation systems, light pipes, and temperature-sensitive skylights, establishing an energy circulation system. The Zero-Carbon Exhibition Hall achieves positive energy through high-performance envelopes and photovoltaic systems, and is expected to achieve carbon balance in the construction process within 4 years. In terms of material selection, renewable and low-environmental-impact materials such as ecological wood-plastic boards, waste stone powder boards, and inorganic mineral coatings are widely used.
After years of operational testing, compared with standard office buildings, the project saves 404,000 kW·h of electricity annually, with a power saving rate of 59%, of which:

· 24% from reduced energy-consuming space;
· 16% from shortened operating hours;
· 8% from renewable energy utilization;
·11% from high-efficiency energy-saving technologies.

Xiong’an Design Center is not only an architectural renovation, but also a practice of “symbiosis between old and new”. It demonstrates a systematic approach for architects to green and reuse existing buildings in urban renewal, providing valuable experience that can be referenced and promoted for urban regeneration.