During the 15th Five-Year Plan period, China will construct a nearly 27,000-kilometer "Golden Outer Ring" highway network—an ambitious figure equivalent to roughly two-thirds of the Earth's equatorial circumference. This vast corridor is formed by linking three trunk routes: border highways G219 and G331, and coastal highway G228. Far more than a simple loop, this 27,000-kilometer "golden edge" serves not only as a tourism route but also as a critical channel for resource development and border consolidation. So, how will this transformative infrastructure empower China's high-quality development?
Recently, the Ministry of Transport announced plans to fully connect the border G219, G331, and coastal G228 national highways during the 15th Five-Year Plan period, creating a "Golden Outer Ring" encircling China's border and coastal regions. Let's first examine the distinct characteristics of each of these three routes.
Li Hongchang, a researcher at the National High-End Think Tank's Sustainable Transport Innovation Center and Beijing Jiaotong University's Beijing Comprehensive Transport Development Research Institute, explained the northern route G331 stretches from Dandong in Liaoning to Altay in Xinjiang, traversing the hills of eastern Liaoning, the Changbai Mountains, the Greater and Lesser Khingan ranges, Inner Mongolia's grasslands, and the Altay region. Along the way, it follows the Yalu, Wusuli, Heilongjiang, and Irtysh rivers, earning its reputation as the "most beautiful border road" with striking mountain-and-water scenery. The western route G219, running from Kanas in Xinjiang to Dongxing in Guangxi, is among the world's highest-altitude highways, with elevations varying by over 5,000 meters and passing through snow-capped peaks, grasslands, deserts, and gobi. The eastern route G228 hugs the coastline, stringing together all core coastal ports into a continuous chain.
The "Golden Outer Ring" is not merely a simple connection of three trunk routes; it must balance multiple factors including development, security, ecology, and openness. It plays a pivotal role in optimizing territorial spatial layout and facilitating the smooth circulation of both domestic and international economic flows. Wu Zhihua, Deputy Director of the Transport Ministry's Comprehensive Planning Department, summarized that "encircling borders and accessing the sea" is the most essential functional description of this network.
"It breaks the past pattern where border and coastal roads were independent and often treated as dead-end branches," Wu said. "Using Dandong, Dongxing, and Altay as connecting points, it links the northern border, western border, and coastline into a complete loop." The network connects hundreds of land ports and all major coastal ports nationwide, upgrading the border and coastal road system from a one-way dead-end structure to a circular network, thereby building a major transport artery for coordinated regional development.
The "Golden Outer Ring" is not an isolated project nor is it starting from scratch. It forms part of the border, coastal, and river-channel corridors among China's four planned transport channel categories, complementing each other to solidify the transport foundation for high-quality development. The Ministry of Transport will prioritize speeding up construction of tunnel and bridge sections along the three highways while simultaneously advancing overall quality upgrades. During the 15th Five-Year Plan period, approximately 7,400 kilometers will be constructed or renovated, with total investment estimated at around 370 billion yuan.
From snowy plateaus to grasslands, rainforests, deserts, and coastal zones, what challenges does building this "Golden Outer Ring" present? Li Hongchang elaborated: "From a construction perspective, the geological and natural conditions are extremely harsh. The western border segment along G219 includes high-altitude areas with permafrost, seismic fault zones, frequent avalanches, and rockfall hazards. The northern line faces gobi wind-sand conditions and large temperature swings, while the eastern coastal section contends with salt spray corrosion and soft-soil foundation settlement—all making construction highly difficult."
"The construction window period is severely constrained, ecological protection requirements are demanding, and capital investment is enormous. Later, the operation and maintenance of such an ultra-long-distance route under extreme conditions—high altitude, permafrost, wind-blown sand—will also be extremely challenging. This is truly a magnificent project, but it is also one with extremely high difficulty across multiple dimensions," he added.
When people think of the "Golden Outer Ring," tourism often comes to mind first—it may well become another "must-drive route of a lifetime." However, this network impacts all aspects of economic and social development. It unfolds not just scenic vistas but a long-term blueprint for coordinated regional development and two-way domestic-international integration. Li noted that once completed, the "Golden Outer Ring" will become a key corridor linking China's border regions, eastern coast, urban clusters, and bay areas—serving as a vital passage for tourism, resource development, and border consolidation.
"It indeed has the functional characteristics of a cultural-tourism corridor, but its transport and logistics capabilities are equally strong, playing a major role in industrial development and import-export trade," Li said. "Additionally, it has emergency response functions and will serve as a lifeline for disaster relief, border patrols, and rapid material delivery. In this sense, it is a strategic and comprehensive corridor, but its most fundamental role lies in transport support and leadership. The 'Golden Outer Ring' also connects scattered border ports, helping to lower logistics costs and drive the development of labor, capital, and trade activities."