Recently, Luoyang LYC bearing co., LTD. and China railway tunnel group jointly held Tunnel Boring Machine remanufacturing main bearing usage assessment meeting in Guangzhou. Luoyang LYC bearing co., LTD. successfully passed the expert group evaluation for Guangzhou metro line No. 4 south 5 standard items project of Tunnel Boring Machine remanufacturing assort main bearing, which makes LYC bearing co., LTD. become the first domestic through industry evaluation enterprise of  Tunnel Boring Machine remanufacturing main bearing. It marks that firstly break Tunnel Boring Machine main bearing remanufacturing technology.