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With the rapid development of Internet technology and the acceleration of globalization, cross-border cybercrime has become a global challenge, and its complexity and severity are increasingly prominent. Cyberspace is unbounded, anonymous and real-time, which provides unprecedented convenience for criminals, enabling them to easily cross-national borders and commit a series of criminal acts that seriously endanger national security, social stability and citizens' rights and interests, including online fraud, online gambling, online money laundering and infringement of intellectual property rights. These crimes not only destroy the order of cyberspace, but also pose new challenges to the legal system and jurisdiction of the real world. As two closely linked economies, Macao and China enjoy the convenience brought by the Internet, but they are also deeply troubled by cross-border cybercrimes. Although the two places belong to the same sovereign country, there are significant differences in legal systems, judicial systems and law enforcement practice, which may lead to conflicts and differences in the jurisdiction, investigation, prosecution and trial of cases. These legal conflicts not only affect the fairness of cases, but also hinder the effective cooperation between Macao and China in combating cross-border cybercrimes, posing a serious threat to maintain social stability and protecting citizens' rights and interests in the two places. Therefore, it is not only of great theoretical significance, but also of far-reaching practical significance to study the criminal jurisdiction over cross-border cybercrimes between Macao and China. From a theoretical point of view, the criminal jurisdiction of cross-border cybercrime involves many disciplines such as constitutional law, criminal law, criminal procedure law, and also the application of the Basic Law of Macao, which is a complex research topic. With the continuous innovation of Internet technology, the applicability of the traditional criminal jurisdiction principle in cross-border cybercrimes is seriously challenged. How to re-examine and define the criminal jurisdiction of cross-border cybercrimes in the new era and how to coordinate the jurisdiction conflicts between different jurisdictions have become urgent problems in current legal research. From a practical point of view, cross-border cybercrime has seriously endangered the social stability and economic development of Macao and China. Criminals use the Internet to engage in cross-border gambling, cross-border fraud, spread network viruses and other criminal activities, which not only bring huge economic losses and psychological trauma to the victims, but also seriously undermine the social atmosphere and market order. Therefore, it is of great significance to strengthen the crackdown on cross-border cybercrimes and improve the criminal jurisdiction system of cross-border cybercrimes for maintaining the stability of the society and promoting healthy economic development in both places.

This dissertation studies the regulatory framework of aviation reform in the Macau Special Administrative Region, focus on the balance between protecting local businesses and promoting market liberalization. The study explores how Macau, as a highly autonomous local administrative region in China with a relatively small economy, can effectively reform its aviation industry while safeguarding local interests in the face of open market competition. The importance of this study lies in its analysis of Macau's aviation sector reforms. As Macau seeks to diversify its economy and strengthen its position as a member of the Greater Bay Area initiative, the aviation industry presents both opportunities and challenges. This research contributes to the broader discussion of how small jurisdictions with special political status can participate in regional economic integration while maintaining their distinct advantages and protecting local interests. The research uses Doctrinal Legal Research and Comparative Legal Research methodologies, utilizing documentary analysis and comparative study methods. This research examines the legal framework of the aviation industry in Macau and the challenges it is currently facing. A comprehensive review of international aviation laws, bilateral air service agreements, and domestic regulations provides the foundation for analyze. The study also conducts a comparative analyze with Hong Kong's aviation framework, offering alternative regulatory approaches for a similar Special Administrative Region of China. Several interesting findings emerged from this research. First, the study identified a fundamental tension between Macau's stated open skies policy and its practical implementation, particularly in limitations of its current concession-based system and the underutilization of international traffic rights. Second, the analysis highlights how the current concession-based system has created a monopolistic market structure that hinders competition and innovation, exacerbated by outdated legislation. Third, the comparative analysis with Hong Kong highlights the importance of a clear legal framework and rules in balancing market liberalization with local industry protection, areas where Macau's current regulations show deficiencies. The concluding thought based on these findings is that Macau's aviation industry reform requires a careful approach that gradually introduces competitive elements while maintaining protections for local enterprises. The study suggests that successful reform will depend on establishing a comprehensive legal framework, implementing a flexible multi-tiered licensing system, enhancing regulatory oversight, and developing mechanisms for regional integration. These reforms must be tailored to Macau's unique circumstances, considering its small market size, political status, and strategic position within the Greater Bay Area.

This thesis first discusses the situation and trends of juvenile crime in Macau in recent years, then reviews the current measures of Macao's juvenile criminal justice system, and the existing policies and regulations on juvenile delinquency, to see what possible impacts of the implementation in preventing juvenile delinquency in Macau. Through analyzing their behavior and causes of juvenile crime in Macau and the youth crime prevention policies in both Macau and neighboring regions. Analyzing the existing policies and regulations on juvenile delinquency, explore the effectiveness of the main existing measures and policies to control this problem, and then make suggestions for control measures based on the future trend of the problem. Throughout the research, it is found that the causes of the problem are not only affected by the subjective psychological state of teenagers, but also affected by differences in social status, socioeconomics, family and school and other external factors.

In the virtual space of the Internet, the boundaries of countries tend to be blurred, and the harmful results caused by criminal acts committed thousands of miles away may very likely be close at hand, and criminal acts committed in the territory of a country may be widespread all over the world, which can be said to be a global plague in the Internet era. As a starting point for the criminalisation of cyberspace crimes, Criminal jurisdiction, which is an important form of national sovereignty exercised by a state, is an important prerequisite for a state to exercise its penal power over cyberspace crimes. Many states, out of a desire to maximise their own national interests, have made constant efforts to expand the jurisdictional scope of application of their domestic laws, resulting in circumstances of positive conflict between two or more states. Exploring possible paths to solving the conflict of criminal jurisdiction over transnational cybercrime should begin by identifying why traditional criminal law is not well suited when entering cyberspace, and by examining the strengths and weaknesses of the legislative practices of more advanced jurisdictions with regard to criminal jurisdiction over transnational cybercrime, the shortcomings of the relevant international law and the generally adopted jurisdictional principles, and the feasibility of the new international theories regarding the establishment of jurisdiction over cybercrime, as the main aspects of this study to disentangle the reasons behind the conflict in establishing criminal jurisdiction over transnational cybercrime.