The International Society on Olfaction and Chemical Sensing (ISOCS) is pleased to announce that the 21st International Symposium on Olfaction and Electronic Nose (ISOEN 2026) will take place in Chongqing, China during May 17-20, 2026. ISOEN is the leading scientific conference dedicated to advances in artificial olfaction, chemical sensing, and related technologies. It brings together researchers and industrial partners around the world to present and discuss the latest innovations in electronic noses, biosensors, and machine olfaction. The conference organizers for ISOEN 2026 is Prof. Fengchun Tian and Prof. Lei Zhang from Chongqing University, who will welcome participants.