According to on-site construction personnel, the single-track length of the section from Nancun Station to Xiaohe Avenue Station is 821.4 meters. Since the shield machine was launched from Nancun Station on April 11, they have overcome difficulties and raced to advance production.

In view of possible accidents during shield machine construction, such as instability of the excavation face, ground settlement ahead of the excavation face, and damage to mechanical equipment, the construction personnel have consistently adhered to the quality inspection system and the settlement warning system, broken down targets, implemented responsibilities, and promptly and effectively solved various problems on site, ensuring controllable safety and orderly production, thus laying a solid foundation for the smooth breakthrough.

According to reports, after the shield machine emerges from the tunnel, the construction personnel will organize an elite team to immediately carry out the first relocation of the shield machine and quickly enter construction on the right line of the section from Nancun Station to Xiaohe Avenue Station.

The full name of the shield machine is shield tunnel boring machine, a type of specialized engineering machinery for tunnel excavation. A shield section is a tunnel section excavated using a shield machine.