Engineering Feats: Defining Complexity and Progress

'Engineering feats' refer to large-scale projects or significant milestones achieved through engineering, often requiring substantial financial resources, technological expertise, and manpower. These feats typically involve a high degree of complexity and risk, and can encompass structures like buildings, bridges, tunnels, water management systems, transportation infrastructure, and energy projects. They play a crucial role in propelling socioeconomic development and technological advancement. Examples of engineering feats include China's Great Wall, the Three Gorges Dam, Beijing Daxing International Airport, and the high-speed rail network.

'Subsea tunnel' is the English term for an underwater tunnel.

'Regional integration' refers to the process of coordinating policies and actions among different regions to foster economic growth, cooperation, and shared prosperity.