Distinguished scholars from around the world gathered at the HK Tech Forum on Data Science and AI (DSAI) from 26 to 27 July to address challenging issues in driving data science and AI technology for the benefit of society. The 2-day forum was jointly organised by the Hong Kong Institute for Advanced Study, Hong Kong Institute for Data Science (HKIDS), and School of Data Science (SDSC) of the City University of Hong Kong (CityU).