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There are more and more uncertain factors affecting the power supply and demand situation in China. Studying and judging the power supply and demand situation in 2021 is of great significance to ensure the stable and healthy development of China's economy and society. Therefore, this paper combed the main factors affecting China's power demand and power supply in 2021, and analyzed the impact on power supply and demand from the aspects of international economy, domestic economy, key industries, climate and temperature, and power substitution. The economic trend, power demand and power supply of China in 2021 were forecasted, and on this basis, the national and regional power supply and demand situation were comprehensively studied and judged. It is estimated that the power consumption of the whole society in China will reach 8.22 trillion kW·h in 2021, and the growth rate will rebound significantly. By the end of 2021, the installed capacity of power generation in China is expected to reach 2.37 billion kW, of which the installed capacity of new energy is expected to account for more than 1/4. Moreover, the power supply and demand situation of China will be generally balanced in 2021, and there may be power supply and demand tension during peak hours in Central China and other regions.

[Objective] Large-scale integrated transportation hub structure is a vital component in urban layout, characterized by significant investment, extensive construction scale, and diverse functionalities. Ensuring the resilience of such buildings to seismic forces, preventing damage while preserving functionality, and providing sufficient safety and comfort under the influence of complex multidimensional traffic are engineering challenges of practical significance. Thus, it is necessary to sort through and summarize relevant literature research on this subject. [Method] The environmental vibration issues caused by various traffic loads along routes and buildings are reviewed. Additionally, the research status of vibration/seismic isolation devices commonly used in transportation hub structures is explored. The research achievements of scholars in China and worldwide in vibration response measurement, vibration prediction simulation, and vibration propagation laws are summarized. Based on the limitations of existing researches, the future research directions in environmental vibration control for transportation hub structure s are discussed. [Result & Conclusion] There is relatively limited research on three-dimensional composite vibration/seismic isolation globally, with a main focus on metro vibration isolation along rail transit lines or superstructures. Research primarily concentrates on experimental studies of the mechanical performance of the proposed vibration/seismic isolation device and vibration/seismic isolation effects. Currently, theoretical and technical research on three-dimensional composite vibration/seismic isolation is not deep enough, and its application is not yet widely adopted or developed into a system approach. Key issues, such as the development of related devices, vibration reduction mechanisms, mechanical performance, theoretical models, remain crucial problems that urgently need resolution.