In the face of scorching heat waves sweeping across South Korea, a unique and mutually beneficial trade dynamic has emerged between China and South Korea, dubbed the 'cool' trade. This phenomenon showcases how geographical proximity and a mature cross-border logistics system can foster economic cooperation, even in times of crisis. As temperatures soar above 40 degrees Celsius in Seoul, the demand for cooling products has surged, and Chinese-made goods have rapidly filled this gap, providing much-needed relief to South Koreans. This 'cool' trade is a testament to the strength of China-South Korea economic and trade cooperation, characterized by flexible responses and regional short-chain supply arrangements. Unlike Western countries, which often rely on long-distance transportation, China and South Korea's close proximity and well-established logistics network enable swift and efficient supply chain responses. This is particularly evident in the diverse array of Chinese-made cooling products that have flooded the South Korean market, from frozen beverages to portable fans and pet cooling accessories. The 'cool' trade is not just about immediate relief; it's a story of mutual benefit and complementary strengths. As Chinese consumers seek South Korean summer cosmetics and personal care products, a two-way trade flow emerges, rooted in the alignment of industrial structures and consumer needs. China's agricultural production, cold-chain infrastructure, and large-scale manufacturing capabilities complement South Korea's expertise in beauty product research and development, quality control, and brand operation. This synergy is further bolstered by the geographical proximity of the two countries, allowing for deeper industrial integration and mutual benefit. In a world increasingly affected by climate change, the importance of regional economic cooperation is being redefined. It's no longer just about market access and cost reduction; it's about safeguarding people's basic livelihoods during sudden disruptions. The shortened transportation window and the ability to swiftly counter market volatility due to emergencies are key advantages of regional cooperation. The deep industrial integration between China and South Korea, spanning electronics, beauty, agricultural products, and cold-chain logistics, has laid a strong foundation for bilateral cooperation. However, the current global supply chain landscape is facing significant challenges due to geopolitical conflicts, rising trade barriers, and extreme weather patterns. This has made long-distance global supply chains fragile and prone to sudden breakdowns. Here, the short-chain cooperation between China and South Korea stands out as a model for the future. By tapping into regional industrial complementary advantages and building more stable and flexible cross-border industrial and supply chains, both countries can reduce circulation costs and ensure industrial stability, ultimately protecting people's livelihoods. This 'cool' trade is not just a temporary solution but a strategic move towards a more resilient and sustainable economic relationship between China and South Korea.