The 20th World Conference of the Associated Research Centers for the Urban Underground Space (ACUUS2027) will be held in Nanjing, China, from November 6 to 11, 2027. The conference is jointly organized by ACUUS and the Jiangsu Society for Underground Space (JSUSS), under the theme “Underground Space: Beneath-Today, Beyond-Tomorrow!” It will bring together leading researchers, professionals, industry experts, and decision‑makers from around the world in the fields of urban underground space planning, development, design, construction, governance, operation, and management.

The year 2027 coincides with the 20th ACUUS Conference. This grand event, to be held in Nanjing, will naturally serve as a magnificent stage for celebrating this milestone. It is both a heartfelt retrospective of four decades of global academic exploration and engineering practice in underground space and an earnest vision for future development directions. At the same time, it also marks the ACUUS Conference’s return to mainland China after an 18-year absence, following the 2009 Shenzhen conference, fully demonstrating China’s rapid progress and growing global influence in the development and utilization of urban underground space. As the highly symbolic 20th edition in the ACUUS Conference series, this conference carries the special mission of bridging the past and the future.

ACUUS 2027 offers a top-tier global platform to showcase advanced technologies and facilitate in-depth sharing of international and domestic research, experiences, and innovations — a must-attend event in urban underground space. We look forward to meeting you in Nanjing in the golden autumn of 2027, to witness together the present and future of underground space.