Group 1 - The construction of the underground space for the subway lines is progressing, with the completion of two tunnel openings for Line 4 and the initiation of the shield tunnel openings for Line 11 [1] - The core structure of the underground space has been completed, and the installation of half-ring steel structures is underway, which will support the future subway operations [1] - The construction site is equipped with air circulation systems and water mist to improve working conditions for the laborers [1] Group 2 - The completed steel ring openings for Line 4 are designed to facilitate cross traffic with Line 11, making the business district station a transfer hub [2] - The underground space is being constructed in phases, with significant progress on the surrounding buildings, including the completion of eight towers forming the Jiangyin skyline [2] - The Yangtze River Financial Center is a key project in Jiangsu's financial cluster, focusing on new financial services, with over 90% of the curtain wall installation completed and expected to finish by the end of September [2]