Under the strategic imperatives of the carbon peaking and carbon neutrality goals and the strategy of a country with strong transportation network, canal construction projects present substantial environmental challenges. The sector’s large-scale engineering projects consume massive energy and material resources, resulting in substantial carbon emissions. Achieving emission reduction has become a critical imperative for boosting sustainable development in China’s transportation infrastructure. Using the Pinglu Canal Project as a case study, this paper reviews current methodologies for carbon accounting in hydraulic engineering and evaluates emerging low-carbon construction technologies. Furthermore, the paper offers three strategic development suggestions, including standardized emission metrics of canals, carbon reduction technology development, and realization path of carbon sink value.

Space transportation system is the most important foundation and prerequisite for all space activities and one of the important symbols of a country’s comprehensive strength. Based on the deep analysis of the development characteristics of the world’s space transportation system, and aiming at building a space power and a world-class space transportation system, this paper systematically sorts out the current development situation, development demands and deficiencies of China’s space transportation system. Looking ahead to the future development trend of China’s space transportation system, this paper puts forward four key objectives of creating expendable launch vehicle, reusable launch vehicle, space transfer vehicle and new concept launch vehicle, respectively, in order to build a space transportation system with strong capacity, comprehensive coverage and advanced performance.