The Asian Aerosol Research Assembly (AARA) has hosted the Asian Aerosol Conference (AAC) every two years since 1999. It is one of the most prestigious conferences for experts and researchers in aerosol science and engineering in Asia. In the past, conferences have taken place in Hong Kong (2019), Jeju (2017, Kanazawa (2015), Sydney (2013), Xi'an (2011), Bangkok (2009), Kaohsiung (2007), Mumbai (2005), Hong Kong (2004), Seoul (2001), and Nagoya (1999).