We would like to invite you to participate in this conference as a sponsor or exhibitor. There are many definitive reasons for your participation, namely the ability to interact with top international and regional experts and researchers in this field and related disciplines through plenaries, technical programme, technical visits, and workshops. This international conference will enable you to showcase your products / services to the key opinion leaders in the field of sustainable urban redevelopment and underground space.   You will see that the ACUUS is a platform to unite all stakeholders to discuss, debate, brainstorm, seek solutions and set directions for the future of underground space. We invite you to stand together with us in the advancement of underground space technology and embrace this rare opportunity to meet with the movers and shakers in this field.