Smart city construction is a global trend in urban development. As one of the most competitive and international cities in the world, Hong Kong has dedicated itself to developing and promoting innovations to facilitate smart city development. In December 2017, the HKSAR Government published the Smart City Blueprint for Hong Kong, aiming to achieve “6S” for Hong Kong (namely, “Smart Mobility”, “Smart Living”, “Smart Environment”, “Smart People”, “Smart Government” and “Smart Economy”). Based on the achievements of the first Blueprint, the Smart City Blueprint for Hong Kong 2.0 was released by the government in December 2020 as the second edition. By the time this article was written, over 100 smart city initiatives had been completed and had succeeded in addressing daily life issues through the most advanced Internet of Things (IoT) technologies