When a food safety scare hits Hong Kong, tracing the source can feel like chasing smoke—over 90% of the city’s food is imported, flowing through a labyrinth of suppliers, processors, and vendors. But a new study led by Prof. Leng Mingming, dean of the Faculty of Business at Lingnan University, offers a clear path forward: a unified, cross-tier food tracing system powered by blockchain and AIoT. The stakes are high in a region where every meal depends heavily on global supply chains, and the solution could transform not just food safety, but trust in what ends up on dinner plates.
The research, published in IISE Transactions, brings together scholars from Hunan University, the University of Southern California, and McMaster University to model a three-tier system linking farmers, manufacturers, and retailers. Using cooperative game theory, they found that when each tier acts alone, the system hemorrhages value—up to 90% of potential profits vanish due to inefficiencies, recalls, and fragmented oversight. But when manufacturers and retailers form a unified alliance, profit losses drop sharply to just 55%. That’s not just a win for business; it’s a lifeline for consumers.
The numbers tell a compelling story. With a shared tracing system, contaminated food is caught earlier, recalls become rarer, and small producers aren’t left behind. The study highlights that 64% of global consumers, according to the Food Industry Association, actively prefer brands that offer full traceability—proof that transparency isn’t just ethical, it’s profitable. By reducing duplicate efforts and spreading costs across the chain, the system levels the playing field, especially for small and medium-sized enterprises that might otherwise be priced out of high-tech solutions.
Crucially, the research shows that fewer, larger coalitions across supply tiers lead to better outcomes than a patchwork of isolated efforts. When responsibility is shared, so are the rewards: efficiency rises, costs fall, and confidence grows. Regulatory pressure also plays a role—when penalties for unsafe food are steep, downstream players have stronger incentives to invest in prevention. That makes policy a powerful catalyst for change.
As an international trade hub, Hong Kong is uniquely positioned to lead in supply chain transparency. Prof. Leng envisions a future where every tomato, every fish, every grain can be traced with a scan—where technology doesn’t just protect health, but strengthens economies. With food safety incidents on the rise globally, the shift isn’t optional. It’s overdue. And the blueprint is now in hand.