The 4th Asia-Pacific Drosophila Neurobiology Conference (APDNC4) will be held April 20-24, 2026, at Shenzhen University of Advanced Technology in Shenzhen, China. APDNC is a rotating regional conference that connects the Drosophila neurobiology community across Asia-Pacific and internationally. APDNC4 will bring together leading and emerging scientists to showcase cutting-edge breakthroughs and technologies in Drosophila neurobiology research, with sessions spanning Circuits, Behavior, Neuromodulation, Connectomics, Technology, Signaling, Synapses, CNS Disease Models, Cell Biology, and Glia Development and Function. Further details can be found at https://lhs.suat-sz.edu.cn/info/1031/1391.htm.