Group 1 - Multiple major engineering projects in China are accelerating, contributing to high-quality development [3] - The Xingtong 200,000 kW wind power project in Inner Mongolia has achieved full-capacity grid connection, generating 560 million kWh of clean energy annually, enough to power approximately 670,000 people for a year [6] - The Shantou Bay underwater tunnel of the Shanshan High-speed Railway has successfully completed its construction, with a total length of 9,781 meters, significantly increasing train capacity from 24 pairs to over 50 pairs daily [8] Group 2 - The "Jiaolong" manned submersible has completed its first sea trial after technical upgrades, achieving a record number of descents with four descents in one day, validating key technical performance indicators [10] - The domestically developed shield machine "Cangyuan" has been launched in Jiangsu, set to undertake the underwater shield tunnel project of the longest highway, with a diameter of 16.66 meters and a domestic technology localization rate exceeding 98% [12] - The Haitaichangjiang Tunnel will effectively alleviate traffic on the Sutong Yangtze River Bridge, playing a significant role in the integrated development of the Yangtze River Delta region and the national strategy for the Yangtze River Economic Belt [13]