On the evening of May 11, the shield tunneling of the right line of the section from Jingwanzi Station to Lin Ke Da Station of Changsha Metro Line 7 broke through. The right line of the Jinglin section has a total length of 769.9 meters. After leaving Jingwanzi Station, the line runs north along Shaoshan Road, successively passing under the Mulian Road Viaduct and several pedestrian underpasses before entering Lin Ke Da Station. The section passes beneath the Mulian Road Viaduct, the D-172 pedestrian underpass, and the D-059 pedestrian underpass, and passes alongside the Hunan Provincial Supply and Marketing Cooperative dormitory.

The plane curve radii of the left and right line tunnels in the Jinglin section are 600 meters and 600 meters respectively. The spacing between the left and right lines is 8.8 to 11 meters. The longitudinal profile of the section tunnel is designed as a "V"-shaped slope, with a minimum gradient of 2‰ and a maximum gradient of 17.947‰, and vertical curve radii of 3000 and 5000 meters. The buried depth of the section tunnel is about 14.4 to 18.1 meters, and the section tunnel mainly passes through pebble layers and fully and strongly weathered argillaceous siltstone.

To ensure the smooth tunneling of the shield in the right line of the Jinglin section, the project department strictly controlled the construction technical control and construction organization arrangements for shield tunneling, carried out scientific planning before shield tunneling, adhered to technology first, organized multiple special meetings and expert review meetings, and continuously improved the shield machine tunneling plan to ensure that the shield machine passes safely and at a uniform speed through high-risk sections. During tunneling, the various processes of shield tunneling were reasonably coordinated, a 24-hour leadership shift system and a work site shift handover system were implemented, and shield tunneling efficiency was improved. At the same time, relevant units were actively contacted, and the problem of soil disposal was proactively solved, effectively avoiding delays in the construction schedule and ensuring the safe and smooth breakthrough of the right line of the Jinglin section.