In the critical period of the “15th Five-Year Plan”, which bridges the past and the future, how to firmly hold the initiative in food security and continuously improve the construction of food security system is extremely important. As a new productivity state characterized by new technology, new elements and new models, agricultural new-quality productivity has a natural fit with the construction of food security system, and it is an important driving force for building the foundation of food security in a big country. As far as the internal logic is concerned, the agricultural new-quality productivity takes agricultural laborers, agricultural meals for labor and agricultural objects of labor as the starting point, injecting endogenous talent momentum, providing equipment technology and infrastructure support, and laying a sustainable resource foundation for the construction of the food security system. However, the current construction of the food security system is confronted with internal and external challenges such as frequent meteorological disasters, local conflicts in certain regions, and the still existing structural contradictions between food supply and demand, which to some extent have slowed down the release of the empowering effect of agricultural new-quality productivity. Therefore, four measures should be taken to fully release the empowering role of agricultural new-quality productivity and steadily promote the construction of food security system during the “15th Five-Year Plan” period, including improving the embeddedness of international food supply chain, deepening the innovation of agricultural policy development, enhancing the scenario of intelligent applications, and strengthening the deep interaction between production and consumption.

In recent years， China’s consumption structure and quality requirements have been constantly adjusted， and the trend of consumption upgrading is obvious. However， in the specific implementation process， many practical challenges have been faced， and it is necessary to leverage the debut economy to achieve a comprehensive and systematic transformation and upgrading. The debut economy can achieve innovation leadership， meet psychological needs， and drive closed-loop iteration through a series of “pioneering” activities， thereby fully empowering consumption upgrading. However， at present， the development of the debut economy is facing many dilemmas， such as insufficient innovation impetus， serious homogenization， lack of consumption willingness， weak perception of cost-effectiveness， single scene carriers， lack of bridge connection functions， and lack of development standards and rules， which hinder its role in promoting consumption upgrading. In view of this， during the 15th Five-Year Plan period， efforts should be made from the supply side， demand side， scene side， and ecological side， with “innovative first-mover” as the driving force， “value resonance” as the orientation， “scene integration” as the core， and “long-term guarantee” as the goal， so as to activate new consumption momentum， release consumption potential， expand consumption boundaries， and consolidate the foundation of empowerment， fully releasing the empowering effect of the debut economy on consumption upgrading and giving full play to the fundamental role of consumption in economic development.

As the Chinese economy enters the stage of high-quality development， the low-altitude economy， as a typical form of new-quality productivity， provides a strategic opportunity to break down the urban-rural dual structure and enhance the resilience of the agricultural industry chain. In view of the current practical problems such as high losses in the circulation of agricultural products and weak risk-resistance capacity， based on the intersection of the analytical framework of industrial value chain theory， factor endowment theory and institutional economics， the interdisciplinary research method of "economics + aviation technology + agricultural engineering" was used to systematically analyze the mechanism of low-altitude economy in the entire agricultural industry chain. The study found that the low-altitude economy enhances the resilience of the industrial chain through a three-dimensional empowerment path： that is， reconstructing the agricultural production system in the upstream， reshaping the production and processing chain in the midstream， and promoting paradigm innovation in the circulation system downstream. However， the technology-embedding process still faces multiple institutional obstacles： lagging rural infrastructure leads to difficulties in technology adaptation， rigid skills formation systems lead to structural imbalances in talent supply， and conflicts between the profit-seeking logic of capital and the goal of inclusiveness cause financing constraints. Based on this， it is recommended to promote policy reforms， improve agricultural infrastructure， strengthen financial support， improve relevant talent cultivation and other measures to comprehensively enhance the resilience of the agricultural industry chain.

The low-altitude economy，as an important component of new quality-productive forces，effectively preventing and resolving security risks in this field is the basic prerequisite for its healthy and orderly development. As a product of the interaction between technological innovation and practical scenarios，the security risks of the low-altitude economy mainly manifest in three dimensions：low-altitude technology，low-altitude scenarios，and low-altitude guarantees. To effectively resolve these security risks，the overall national security perspective provides theoretical guidance for the governance of low-altitude economic security risks in China from four dimensions：the principle of people-centered security purpose，the overall theory of coordinating security and development，the theory of strengthening self-organization and functional systems，and the theory of integrating multiple entities and all elements for coordinated collaboration. In terms of specific paths，it is necessary to establish the governance goals of people’s security and inclusive prudence，adhere to effectiveness and fairness as the specific standards for evaluating governance effectiveness，improve the rule system for risk distribution and the connection between hard law and soft law，perfect the practical mechanism of multi-entity collaboration and technical support，and build a governance pattern for the orderly development of the low-altitude economy security.

Using the establishment of China’s Comprehensive Pilot Zones for Cross-Border E-Commerce as a quasi-natural experiment， this study constructs a difference-in-differences model to evaluate the impact of cross-border e-commerce policies on the tax compliance behavior of export enterprises. The findings reveal that cross-border e-commerce policies significantly curb corporate tax evasion. The conclusion remains robust after a series of tests. Mechanism analysis indicates that these policies operate through three channels： alleviating financing constraints， strengthening information supervision， and enhancing tax enforcement intensity， reflecting a mechanism combining financial pressure mitigation with regulatory constraints. Heterogeneity analysis further demonstrates that the policy effects are more pronounced among private enterprises， small-scale firms， and enterprises in coastal regions. Accordingly， under the context of tax governance in the digital economy era， it is essential to deepen the application of digital regulatory technologies to promote the high-quality development of cross-border e-commerce. Simultaneously， differentiated policy support should be implemented to improve corporate tax compliance and contribute to the sustainable development of a modern fiscal system.

The sustainability of China’s basic pension system has increasingly drawn widespread social attention. Based on the human capital theory and from the perspective of the “quantity-quality” transformation of the population， a mathematical model and numerical simulation were constructed to deeply analyze the impact and mechanism of this transformation on the sustainability of the basic pension system. Empirical testing was conducted using panel data from 2001 to 2023. The findings reveal： firstly， an improvement in population quality can alleviate the negative impact of a decrease in demographic dividend on wage income， that is， the population “quantity-quality” transformation can promote an increase in wage income； secondly， the “quantity-quality” transformation can offset the impact of aging on the sustainability of the basic pension system through wage income effects； thirdly， the core and outcome of the population “quantity-quality” transformation lies in the systematic improvement of population quality， which can further enhance the sustainability of the basic pension system by increasing wage income. After considering regional and temporal heterogeneity， this conclusion still holds true. Based on this， in the future， we need to increase the popularization rate of higher education and increase the proportion of college students per 10000 people； we should attach importance to the healthy development of the population and promote the improvement of healthy human capital； we need to implement differentiated policies for regions and time periods， and fully leverage the demographic dividend to promote the sustainability of the basic pension system.

Organized research is a highly socialized way of knowledge production. Organized research has distinctive "organized" characteristics， which is manifested in external demand-oriented research objectives， focusing on national strategies and major social issues， with fixed teams， common and clear research goals， and collectivist organizational culture. Organized research faces a triple conflict when it is carried out in Chinese universities： Firstly， the institutional conflict， it is difficult for scholars to achieve individual goals in organized research； Secondly， there is cultural conflict， the individualistic culture of scholars and the collectivist culture of organized research； Thirdly， the humanities further aggravate the difficulty of organization due to the lack of standardized research methods， the knowledge production process cannot be separated， and the threshold for team formation is high. Based on this， this paper suggests that the applicable scenarios of organized research should be clarified， and the collaboration between organized research and individualized knowledge production activities should be strengthened.It is also necessary to carry out systematic design and dynamic adjustment of organized research system.

This paper analyzes the logic, challenge, and pathway of integrating education, science and technology,and talent from the perspective of translation within Actor-Network Theory. According to the research findings, in terms of Actor-Network Theory, the integrated advancement of education, science and technology,and talent is basically a translation process of problematization, interessement enrolment and mobilization among government, universities, enterprises, and research institutions, where an Actor-Network to support a virtuous cycle of education, science and technology,and talent is built. However, in reality, the issues such as different interest leads to insufficient synergy, system lack reduces motivation, and lagging role transition diminishes agency capacity, weaken the translation effect. To address these issues, the government as the core actor, should strengthen visionary guidance and integrated planning, improve institutional and policy support, to foster value consensus and coordinated action among diverse actors. Meanwhile, other actors such as universities, enterprises, and research institutions, should accelerate role transitions and enhance their capacity to implement shared objectives.

The rapid advancement of digital technologies has profoundly reshaped the landscape of international engagement. As a novel vehicle for public diplomacy， social platforms have opened new spaces for people-to-people exchanges between China and the rest of the world. Against the backdrop of accelerating global transformations unseen in a century， such exchanges have increasingly functioned as a “ballast stone” sustaining the resilience of bilateral relations， a new channel for narrating China’s stories， and a vital bond for fostering a community with a shared future for mankind. Leveraging the advantages of low-cost accessibility， high interactivity， and diversified modes of storytelling， social platforms have significantly enhanced China’s international communication capacity， soft power projection， and national image construction. However， social platforms also exhibit a “double-edged sword” effect. Excessive commercialization， improper algorithmic practices， and the spread of disinformation may generate information cocoons， reinforce cultural biases， and erode the trust foundation of people-to-people exchanges. To better leverage the positive role of social platforms in promoting China foreign people to people exchanges， it is essential to take social platform governance as the key lever and build a collaborative governance system that includes technological regulation and content ecosystem as the foundational guarantee， policy support as institutional incentives， and the role of influencer effects， international cooperation， and higher education institutions as supplementary supports. By promoting algorithmic responsibility and high-quality content co-creation， the proposed governance framework aims to enhance the sustainability and effectiveness of China-foreign people-to-people exchanges and provide institutional support for strengthening national soft power and improving China’s global image.

The production and communication of network culture are accomplished against the background of recognizing and encouraging intersubjectivity， and gradually give rise to a network culture ecosystem charocterized by multiple coexisting subjects. In this process， subjectivity risks emerge along different dimensions. From the perspective of network culture security governance， an analysis of the causes and manifestations of such risks in human-machine co-creative practices reveals two core aspects： Firstly， a loss of subjectivity stemming from the coexistence of multiple cultural agents under the dominance of inter-subjectivity； Secondly， the alienation of subjectivity arising from human-machine co-creation in which AI is involved. It is therefore proposed that strengthening the construction of subjectivity in network culture should strive for value alignment， so as to reconcile the divergence between human value logic and media technological logic. By identifying and circumventing subjectivity risks in the production and communication of network culture， we can address the fundamental questions of “by whom” and “for whom” network culture is produced and circulated， thereby facilitating the governance of network cultural security and fostering a flourishing network culture.