Ping Cui, Vice Dean, School of Thermal Engineering, Shandong Jianzhu University, China, Registered Building Service Engineer (HVAC), Member of ISGSHPA, Member of international association of underground space and environment. Area of expertise: Building energy-saving technologies; and renewable energy applications, especially geothermal energy and solar energy. Relevant research work: Presided over/or conducted more than 10 scientific research projects from national and local government and industrial funds.