Walk along Shanghai's waterfront and you will see the familiar theater of globalization: container ships stacked high, crane arms swinging in rhythm, the ceaseless churn of commerce. But look closer — or rather, deeper. Eighty-nine meters beneath the busy shipping lanes, a tunnel boring machine the height of a five-story building, bristling with sensors and guided by an artificial "brain", is grinding through the rock strata. It is boring the 14-kilometer Chongming-Taicang tunnel, which is the linchpin of a 2,000-km high-speed railway that will link Shanghai to Chengdu, capital of Southwest China's Sichuan province. It tells you a lot about how China's economic system works.

In many advanced economies, major infrastructure projects often involve lengthy deliberation and debate. In China, projects are measured in years. The 15th Five-Year Plan (2026-30) lists 109 major projects, among them the Yangtze River high-speed rail corridor — one of the most ambitious. Costing more than 500 billion yuan ($72 billion), it is expected to generate nearly 1.5 trillion yuan in upstream and downstream industrial value added.

By the end of the decade, China will have substantially completed the "eight vertical and eight horizontal" high-speed rail grid, and the overall framework of its national comprehensive transportation network will have advanced from its current 90 percent completion rate to over 95 percent.

Yet the real story is not scale, but synergy.

Consider the supply chain. A single tunnel boring machine requires bespoke components — its "nerve endings" — and a sophisticated digital control system. The construction of the railway has already driven demand for more than 200 customized tunneling and bridge-building units. The 570,000 tons of high-strength specialty steel needed for the rails have found ready suppliers. Even the precast concrete segments used in the tunnel lining have given rise to smart factories.

This is what economists would recognize as the building of economic complexity: a shift from low-value assembly to a dense ecosystem of advanced capabilities. China is not merely laying track; it is upgrading the productive DNA of entire regions.

Now look at the railway in relation to China's advanced manufacturing clusters. The line will connect more than a quarter of them, along with nearly 40 percent of the country's key laboratories. Innovation, in effect, will travel along steel arteries. More than 20 smaller cities will, for the first time, be plugged into the 350-km-per-hour network. Take Lezhi county in Sichuan for example. Its station remains under construction, yet business travel has already picked up, and investment delegations are arriving. This is structural transformation in real time.

The Yangtze corridor is no isolated endeavor. The 15th Five-Year Plan is threaded with similar strategic transportation projects. The Shiziyang passage — a double-deck road bridge spanning the Pearl River estuary — will draw Guangzhou's Nansha district closer to Dongguan's Humen town, accelerating the integration of the Guangdong-Hong Kong-Macao Greater Bay Area into a world-class urban cluster.

Further west, the Pinglu canal will cut 560 kilometers from shipping routes for cargo from Southwest China, linking inland regions directly to the Beibu Gulf.

What some in the West view as top-down direction is described by Chinese policymakers as coordinated strategy. The economists' "quadruple helix" — government, industry, universities and society — is plainly visible. The Yangtze River high-speed rail corridor will facilitate the flow of capital, talent and technology between inland regions and coastal powerhouses, providing a pathway for regions lagging behind to catch up.

These mega-projects reward cross-regional collaboration, optimizing energy use, investment, talent and natural resources across jurisdictions. The result is a system capable of translating grand blueprints into tangible outcomes — with an emphasis on coordination, inclusiveness and sustainability.

In a volatile global landscape, China is leaning on its structural strengths: long-term planning, high implementation capacity, a resilient economy, a comprehensive industrial base and a superlarge domestic market. The Yangtze corridor is a vivid illustration of this. While skeptics in parts of the West question whether China is nearing its growth limits, the country continues to press ahead — focused on vision, actions and results, and intent on pursuing its own path to development to become a better self.