On February 27, the reporter learned from Fangda Group Northern Heavy Industries Group Co., Ltd.(NHI) that the "Cooperation No. 2" and "Cooperation No. 3" TBMs, a collaboration between NHI and Shenyang Tunnel Boring Equipment Engineering Co., Ltd., have successively broken through on the Phase II project of the eastern extension of Shenyang Metro Line 9, successfully completing their tunneling tasks. Together with the "Cooperation No. 4" TBM, they have laid a solid foundation for the subsequent track laying, commissioning, and operation of the metro line.

The breakthrough of the two TBMs demonstrates the technical strength of local equipment enterprises and their commitment to serving local development. It is reported that the "Cooperation No. 2" TBM was launched from Guogongzhai Street Station on the left line of the Guo-Chang section of Phase II of Line 9 in July 2025, and was successfully received at Chang'anqiao South Street Station on January 2, 2026, completing a tunneling task of 1628.4 meters. The "Cooperation No. 3" TBM was launched from Shimiaozi Station on the right line of the Guo-Shi section in September 2025, and was smoothly received at Guogongzhai Street Station on January 12, 2026, completing a tunneling task of 1240 meters. Since its launch from Shimiaozi Station on the left line of the Guo-Shi section in October 2025, the "Cooperation No. 4" TBM has advanced steadily. It successfully completed pile jacking on February 10, 2026, with a cumulative tunneling task of 1294.8 meters.

Faced with multiple challenges during construction, including complex geological conditions, the 10-year service life of the "Cooperation" series TBMs, and component aging and wear, the technical and maintenance teams of NHI took the initiative to work on-site, responded rapidly, and carried out efficient troubleshooting, promptly addressed various faults and hidden risks, and innovatively launched equipment function optimization schemes, which effectively reduced downtime and improved construction efficiency. All staff worked closely and cooperated tacitly with the construction team. With solid expertise and high-quality services, they ensured the safe and steady progress of the project and finally completed the construction task ahead of schedule. Their professional capabilities and service quality have won high praise and full recognition from the client.