Vincent S. Cheng is Director of the Building Sustainability Group at Arup in Hong Kong. Dr Cheng has 20 years of professional experience in building energy efficiency and is an expert in sustainable master planning and building design, specialising in green code formulation, HK-BEAM and LEED assessment, life-cycle analysis and Air Ventilation Assessment (AVA) and District Cooling Systems (DCS). He is Council member of HK Professional Green Building Council and represents the Arup HK office on the Arup's Sustainability Task Force. Jimmy C. Tong is East Asia Energy Skill Leader and an Associate at Arup in Hong Kong, focusing on Building Sustainability. Dr Tong has expertise in energy systems in various sectors, including wind, solar, and other renewable energy, infrastructure and building services, and product and system development, and his current focus is creating and transforming cities and buildings toward a greener future.