During my research into the construction of Baihetan Dam, I was fascinated by the innovative approach engineers took to address the challenges of durability and flood safety. A particularly impressive feature is the so-called "mirror slide" system, designed to allow controlled movement of the dam structure in response to water pressure and temperature changes, effectively preventing cracks—a common issue in massive dam projects. The dam sits on basalt rock formations, which are prone to cracking due to their columnar joint structure, similar to loosely bonded hexagonal columns. This inherent fragility required engineers to devise precision blasting and support techniques that not only preserve the mountain's integrity but also provide strong anchorage for the dam. Thousands of anchor rods and steel meshes were installed layer by layer, firmly locking the surrounding rock and creating a stable foundation. What stood out to me is the seamless integration of environmental and engineering considerations, balancing the immense hydraulic forces with geological realities. This precision "surgical" excavation and reinforcement demonstrate human ingenuity in infrastructure development, pushing the boundaries of what is possible in hydropower engineering. Moreover, the dam's underground cavern system houses sixteen giant turbines inside massive underground factories. These caverns, longer than a 217-kilometer length, rival metropolitan distances such as Beijing to Tianjin, highlighting the monumental scale of the project. The construction team overcame significant difficulty navigating fragile interlayer fault zones within the mountain, akin to weak sandwich layers, using advanced support technology to ensure stability and safety. Experiencing the story of Baihetan Dam's construction offers valuable insight into the evolving field of hydropower technology and infrastructure resilience. The success here can inspire future large-scale sustainable energy projects worldwide, providing clean power while guarding against natural disasters such as floods.