On September 11, 2025, by China Railway Engineering Equipment Group Co., Ltd. (CREG) has successfully completed the excavation engineering of the Fortezza Railway Tunnel Project in Italy, by applying its remanufactured earth pressure balance TBM "China Railway R303", which is the first remanufactured TBM exported from China to Europe. The completion of this excavation marks the official successful application of CREG’s remanufactured machine in overseas high-end markets.

After the transformation, the excavation diameter of the equipment reached 11.05 meters. In view of the difficulties of high rock strength in the stratum, the technical team optimized the cutter trace and strengthened the panel structure of the cutter head, which greatly improved the rock breaking ability of the original cutter head, realized the "cross-generation upgrade" of shield performance and significantly improved the tunneling efficiency.