On July 31, the shield machine for the right line of the Hengxiang section of the Nanzhong 2 Bid Project was successfully launched. The Hengxiang section has the longest shield tunneling mileage in the project; its left line has already been successfully launched as the first shield and is tunneling normally. The smooth launch of the right-line shield now marks the section's formal entry into the stage of simultaneous two-line shield tunneling.

The right line of the Hengmen Shaft–Xiangshan Station section is 3,079.99 meters long. The section passes through composite strata dominated by silt, mucky soil, silty clay, sandy cohesive soil, completely weathered mixed granite, and strongly weathered mixed granite. After exiting the Hengmen Shaft, it turns northeast on a 1,400-meter radius, passes beneath a water supply pipe, the Damao River, and a DN660 high-pressure gas pipeline, then continues northeast; after passing beneath the Hengmen Waterway it enters Hexin Road, passes alongside Zhongshan Yuehai City, Vanke West Coast, and China Merchants Zhenwan Mansion, and then continues along Hexin Road to reach Xiangshan Station. The section has 4 cross passages, a maximum longitudinal slope of 24‰, a line spacing of 11 m to 28.12 m, and a burial depth of 7.2 m to 39 m. The section has 4 cross passages; the geological conditions are complex and construction is difficult.

To ensure the smooth launch of the shield, the project department made thorough arrangements and planned ahead. First, it organized relevant technical and management personnel to go to the site on multiple occasions, held scheme analysis and discussion meetings, and invited experts to hold review meetings, so as to improve the scheme according to local conditions, optimize construction techniques, and make full preparations for the shield launch. Second, it strictly implemented the safety production principle of "not stepping on the red line and not touching the bottom line," adhered to the leadership shift duty and on-site supervision systems, and ensured controllable safety. Third, it fully allocated construction resources including personnel, materials, and machinery, and formulated targeted and operable emergency plans. Fourth, it provided full coverage of construction and safety technical briefings on key processes such as shield launching and segment assembly to on-site work teams. At the same time, the project department made adequate preparations for shield machine assembly and commissioning, emergency materials, and standardized civilized construction on site, and worked with the shield machine manufacturer to optimize equipment parameters, efficiently and orderly completing pre-launch preparations such as shield hoisting and lowering into the shaft, installation and commissioning, and condition acceptance, thereby ensuring the shield launched on schedule.

The project management team will continue to maintain its vigorous drive for fast and intensive work, devote itself to project construction with a sense of urgency and eagerness to seize every minute, continue to uphold the philosophy of "customer first, focus on value creation, and always be a pioneer," strive to build a quality project, and make new contributions to rail transit construction.