On Mar 30th,in the construction of the Hefei Rail Transit Line 3 in Anhui Province, China's first re-manufactured shield machine using domestically-made main bearings successfully completed the 2369.65 meter excavation task. The diameter of the main bearing of the shield machine is 2.6 meters, which can meet the continuous working of more than 15,000 hours for a shield machine with a diameter of 6 to 7 meters, indicating that China has mastered the core technology of the development of the main bearing of the shield machine, breaking a few foreign companies Technical monopoly. It shows that the domestically produced main bearing developed by LYC has withstood the practical inspection and is of great significance for promoting the localization of the core components of the shield machine.