Group 1 - High-quality development is the primary task for building a modern socialist country, emphasizing the need for a solid material and technological foundation [1] - During the "14th Five-Year Plan" period, China has effectively responded to various risks and challenges, leading to significant enhancements in economic, technological, and comprehensive national strength [1] - The successful launch of the world's first shield tunneling machine capable of continuous diameter changes marks a major breakthrough in urban rail transit construction [1] Group 2 - Emphasis on high-quality development tailored to local conditions, promoting new industries, models, and driving forces based on local resources and industrial foundations [2] - China has the largest R&D workforce globally, with 26 top technology innovation clusters and over 460,000 high-tech enterprises, with R&D investment expected to exceed 3.6 trillion yuan in 2024, a 48% increase from 2020 [2] - The national innovation capability ranking improved from 14th in 2020 to 10th in 2024 [2] Group 3 - The deep integration of technological and industrial innovation is transforming innovation potential into economic momentum, with high-tech manufacturing value added increasing by 42% since the end of the "13th Five-Year Plan" [3] - Domestic demand is the main driver of economic growth, contributing an average of 86.4% to economic growth during the first four years of the "14th Five-Year Plan" [3] - China's economy is projected to reach approximately 140 trillion yuan this year, with a consistent contribution of around 30% to global economic growth [3] Group 4 - The journey towards building a modern socialist country is marked by significant steps in economic development, fostering a spirit of hard work and unity [4]

Core Viewpoint - The launch of the world's first in-situ variable diameter shield machine "Bianjing No. 1" marks a significant breakthrough in China's rail transit construction, enhancing the country's high-end equipment manufacturing capabilities [1][2] Group 1: Technological Innovation - "Bianjing No. 1" shield machine integrates the construction of interval tunnels and station tunnels, addressing issues related to traditional construction methods such as ground excavation, construction interruptions, and site occupation [1][2] - The machine can freely adjust its diameter, achieving innovative "one station, two tunnels, continuous forming" construction, which is a world-first technology [2] - The project team overcame multiple global challenges and integrated various independent innovative technologies, including multi-cutter beam synchronous expansion and intelligent control systems [2] Group 2: Economic and Environmental Impact - The successful development of "Bianjing No. 1" provides a new green, safe, efficient, and resource-conserving construction solution for global underground engineering [2] - The machine is particularly suitable for construction in densely built, busy urban core areas, achieving "small disturbance, low impact, and micro-interference" [1]