On January 5, as the shield machine's cutterhead broke through the soil from the portal, the right line of the shield-driven section from Huaqiang South Station to Zhongda Eighth Hospital Station on Phase II of Shenzhen Metro Line 11, constructed by Chengtong Company of China Railway No.2 Engineering Group, was successfully holed through.

The right line of the Huaqiang South Station to Zhongda Eighth Hospital Station section has a total length of 95.081 m, with a line spacing of 10.63–14.63 m, a minimum horizontal curve radius of 420 m, a maximum longitudinal gradient of 5‰, a single-slope longitudinal profile, and a tunnel crown depth of 20.7 m. The section tunnel is constructed by the shield method. The shield launched from the large-mileage end of Huaqiang South Station, successively passing beneath Exit B of Huaqiang South Station on Line 7 and the tunnel section from Huaqiang South Station to Huaqiang North Station on Line 7, passing alongside the diaphragm wall of Huaqiang South Station on Line 7, Exit C of Huaqiang South Station, Shangbu Building, and Huayue Guesthouse, and finally being received at the small-mileage end of Zhongda Eighth Hospital Station. The construction carries high risk and great difficulty.

To ensure the shield machine tunnels safely and smoothly under complex construction conditions, the project construction team planned ahead and overcame difficulties. It repeatedly invited external shield experts for demonstration and review, continuously optimized the construction plan, monitored construction risks around the clock, and assigned dedicated personnel to regularly maintain and service key equipment such as the shield machine and gantry crane, ensuring smooth tunneling and successful reception of the shield machine.

To effectively mitigate the safety risks of launching and crossing the existing Metro Line 7 and buildings, the project continuously strengthened construction organization and management and formulated targeted measures for different risk sources. During the underpass of the existing Metro Line 7, dedicated personnel were arranged for daily inspections, and the shift-leading manager and production personnel stood watch inside the shield machine 24 hours a day. During the crossing, automated monitoring data changes were summarized every hour, dynamic monitoring was strengthened, monitoring points were densified, monitoring frequency was increased, and the settlement changes of the Line 7 tunnel were fully controlled. In addition, before launch, the project strictly followed the design requirements to reinforce the ground at the receiving end with high-pressure jet grouting piles, effectively reducing disturbance to the soil during shield reception and increasing soil stability.