Xin Zhang obtained his Ph.D. degree from Tianjin University and is currently working at Nanyang Technological University as a research fellow. His research focuses on indoor air quality, air filtration theory and technology. Presently, he is involved in a project that applies acoustic agglomeration to air filtration pretreatment to save energy. Additionally, he has a keen interest in the application of nanofiber media in air filtration, particularly in HVAC systems.