Allied Sustainability and Environmental Consultants Group Ltd is an investment holding company principally engaged in green building certification consultancy business. The Company operates its business through four segments. The Green Building Certification Consultancy segment is mainly engaged in the consultancy on the application of green building certification for new buildings, existing buildings and interiors of buildings. The Sustainability and Environmental Consultancy segment is mainly engaged in the providing of consultancy on sustainability and environmental impact assessment. The Environmental, Social, and Governance (ESG) reporting and consultancy segment is mainly engaged in the ESG reporting and consultancy. The Acoustic, Noise and Vibration Control and Audio-visual Design Consultancy segment is mainly engaged in the design for architectural acoustic, mechanical vibration, noise control and audio-visual systems.