On November 3rd, China Urban Development Research Association, Zhongguancun Gongxin QR Code Technology Research Institute, Global City Smart Engineering Technology Research (Beijing) Center jointly released the smart city code identification system in Shijiazhuang City, Hebei Province, and simultaneously launched each City code application work. According to Zhang Chao, Dean of Zhongguancun Gongxin QR Code Technology Research Institute, the smart city code identification system is based on blockchain technology. It is independently developed, distributed and managed by China. It has unified distribution rules, distributed storage analysis and code. The non-tamperable features can realize the interconnection and data sharing of various elements within and between cities, and is an innovative practice that promotes the combination of the underlying technical services of blockchain and the construction of new smart cities.