ALLIED SUSTAINABILITY AND ENVIRONMENTAL CONSULTANTS GROUP LIMITED is an investment holding company mainly engaged in the provision of environmental consulting services. It mainly operates through four segments. Green Building Certification Consultancy segment is involved in consultancy on the application of green building certification for new buildings, existing buildings and interiors of buildings. Sustainability and Environmental Consultancy segment is involved in consultancy on sustainability and environmental impact assessment for compliance with statutory requirements in relation to environmental impact and pollution control. Acoustics, Noise and Vibration Control and Audio-Visual Design Consultancy segment is involved in designs for architectural acoustic, mechanical vibration, noise control and audio-visual systems. It operates its business in Hongkong, the People’s Republic of China and Macau.