On March 18, the first pair of 500-meter-long steel rails was smoothly laid onto the ballastless track at the Cuijiazhuang track-laying base in Kunming, Yunnan province. This milestone marked the official commencement of track-laying construction for the Yunnan section of the Chongqing-Kunming High-speed Railway.

The track-laying construction for this vital railway artery primarily involves the installation of a total of 846 kilometers of steel rails. According to the project schedule, this phase is expected to be completed by the end of August. Once the railway is fully open for operation, the travel time between the southwestern cities of Chongqing and Kunming will be drastically reduced from the current five hours to approximately two and a half hours.

As a crucial component of the Beijing-Kunming channel within China's "Eight Vertical and Eight Horizontal" high-speed railway network, the Chongqing-Kunming High-speed Railway represents more than just the physical connection of a single transit line. It bears the strategic mission of accelerating the construction of the national comprehensive multi-dimensional transportation network.

According to the Ministry of Transport, the main skeleton of this national comprehensive multi-dimensional transportation network has been basically connected. It now links over 80 percent of the country's county-level administrative regions and serves approximately 90 percent of the national economy and population. During this period, fixed-asset investment in transportation reached 18.8 trillion yuan ($2.75 trillion), significantly enhancing comprehensive transportation capacity and operational efficiency.

This progress is marked by the comprehensive completion of a large batch of landmark major projects, including the Shenzhen-Zhongshan Link, the expansion and reconstruction of the Liaoning section of the Beijing-Harbin Expressway, the renovation of the Beijing East Sixth Ring Road, the Changtai Yangtze River Bridge, the Dongjiakou port area of Qingdao Port and the Jiangyin port area of Fuzhou Port.

Currently, the main channels of the "Eight Vertical and Eight Horizontal" high-speed railway network have also seen significant progress, with nearly 84 percent of the planned network already put into operation. It is projected that by the end of the 15th Five-Year Plan (2026-30), this high-speed railway blueprint will be basically completed.

By that time, a "1 to 4-hour transportation circle" between adjacent large and medium-sized cities, alongside a "0.5 to 2-hour transportation circle" within major city clusters, will be gradually formed. This development will make daily travel and commuting significantly convenient and efficient for the public.

Looking ahead to the 15th Five-Year Plan period, another wave of landmark major projects will be completed and put into operation. These include the Shiziyang Link, the Zhangjinggao Yangtze River Bridge, the Pinglu Canal of the New International Land-Sea Trade Corridor and the Shanghai East Railway Station of the Oriental Hub.

Simultaneously, construction will be accelerated on a series of critical projects, such as the G219 and G331 border highways, the G228 coastal highway, the quality upgrading and reconstruction of the Sichuan-Tibet Highway (G318), the Shanghai-Chongqing-Chengdu High-speed Railway along the Yangtze River, the G3033 Kuytun-Dushanzi-Kuqa Expressway, and the Dalian Jinzhouwan International Airport comprehensive transportation hub. Preliminary work will also be expedited for major engineering projects like the G0412 Shenzhen-Zhuhai Link, the G1536 Lianhuashan Link, and Guangzhou's new airport in the Gaoming district of Foshan.

When transportation networks are seamlessly interconnected, the flow of logistics and human resources is revitalized, making the foundation for industrial development more robust. Using transportation infrastructure to activate economic elements and subsequently leveraging these elements to expand development space is the core strategic significance of constructing the national comprehensive multi-dimensional transportation network.

The outline of the 15th Five-Year Plan proposes the implementation of 109 major engineering projects. Among these, 23 projects are specifically focused on building a modern infrastructure system, which includes the continuous advancement of the national comprehensive multi-dimensional transportation network.

Guo Liyan, deputy director and a researcher of the Economic Research Institute of the National Development and Reform Commission, highlighted the scope of these infrastructure initiatives.

"In accelerating the construction of a modern infrastructure system, the major projects of the 15th Five-Year Plan focus on 'six networks', namely the water network, the power network, the computing network, the logistics network, the new type of communication network and underground pipe networks," Guo said.