Group 1 - The concept of "leaving blank" in urban development reflects a shift in thinking and methodology, allowing cities to reserve space for future growth and attract quality projects and emerging industries [1][2] - Major cities like Beijing, Shanghai, and Qingdao are designating "blank" land and implementing management measures, indicating a change in development philosophy [1] - The construction of Xiong'an New Area emphasizes ecological value and long-term planning, with a current forest coverage rate of 35% and over 20 million trees planted [1] Group 2 - The strategy for the Yangtze River Economic Belt focuses on ecological protection rather than extensive development, leading to improved water quality and biodiversity [2] - Qinghai's Xining Ganhe Industrial Park is eliminating low-efficiency and high-emission enterprises to seize opportunities in new materials and renewable energy, showcasing a commitment to ecological safety [2] - The approach to development involves a strategic mindset that balances priorities and boundaries, ensuring that new technologies and industries are regulated while allowing for growth [2]

Core Viewpoint - The development and utilization of underground space is crucial for addressing urban development bottlenecks in China, as highlighted by the recent policy document from the Central Committee of the Communist Party and the State Council [1][2]. Group 1: Systematic Thinking - Urban infrastructure must be managed as a cohesive whole, integrating underground space as an organic part of the city [1]. - A full lifecycle management system from planning to construction and operation is essential to maximize the potential of underground space [1]. - Coordination among various infrastructure systems such as transportation, energy supply, communication, and drainage is necessary for effective underground space development [1]. Group 2: Forward-Thinking - Urban infrastructure should be designed with future developments in mind to avoid obsolescence shortly after completion [2]. - Sufficient capacity should be reserved in underground space design to prevent the need for frequent renovations [2]. - Infrastructure should be adaptable to new technologies, ensuring compatibility between old and new systems [2]. Group 3: Bottom-Line Thinking - Emphasis on safety measures for critical utilities like gas and water is vital, with a focus on establishing emergency response systems [2]. - The development of underground space must not overlook safety management in less visible areas [2]. - A robust standard system for underground construction and operation should be established to ensure quality and safety throughout the project lifecycle [2].

Group 1 - The core viewpoint is that the recent India-Pakistan air conflict serves as a significant milestone for China, prompting a reevaluation of its national capabilities and technological advancements [5]. - The belief that China's technological strength has surpassed that of the United States is gaining traction, with evidence suggesting that the technological gap is closing or has already been bridged [2][3][4]. - The advancements in military technology, particularly in missile systems and radar capabilities, indicate that China has been operating from a position of strength, which was not widely recognized until recent events [2][3]. Group 2 - The narrative surrounding the development of China's high-tech industries has shifted, with the perception that external pressures have inadvertently accelerated domestic advancements rather than stifling them [2]. - The importance of using updated data for accurate assessments of technological progress is emphasized, contrasting outdated perceptions that may lead to erroneous conclusions about national capabilities [3][4]. - The showcasing of military technology during national events, such as the 2017 National Day parade, highlights China's advancements that were previously underestimated [2][3].