On September 20, as the "Fenjin" (Striving) shield machine broke through the soil and arrived at the receiving shaft of Sanhao Street Station, the right line of the Fangxing Square Station–Sanhao Street Station section of Shenyang Metro Line 3 Lot 12, constructed by the company, was successfully holed through, marking the completion of twin-tube holing-through in this section and the project's official entry into the ancillary works construction stage.

The right line of the Fang-San section of Shenyang Metro Line 3 has a total length of 816 meters, with a minimum curve radius of 450 meters; its longitudinal profile adopts a "V"-shaped gradient with a maximum slope of 28‰. During tunneling, the shield machine passed alongside multiple structures and buildings, including the Liaoning Provincial Planning Institute, Nanhu Building and a pedestrian overpass, and passed beneath major risk sources such as the South Canal and an underground utility tunnel at close range.

To ensure smooth tunneling and reception of the shield machine, the project department planned ahead, made meticulous arrangements, strictly controlled the process and strengthened attention to details. It organized multiple scheme seminars and expert review meetings, fully identified and pre-controlled risk factors, carried out tabletop exercises for shield machine translation, continuously improved safety assurance measures and emergency response plans, and conducted targeted emergency drills in due course, ensuring the entire construction process remained controllable. At the same time, it strictly implemented the leadership shift supervision system for high-risk procedures, tightly controlled the quality of key processes such as segment assembly, simultaneous grouting and secondary grouting, strengthened process re-surveying and monitoring measurement, and used an informatization platform to fully monitor shield tunneling parameters and attitude, conducting timely technical analysis and real-time adjustments to ensure the safe, stable and orderly advancement of the shield machine.