China Railway Engineering Equipment Group (CREG) EPB TBM Qianjin (CREC 773) successful finish Guiyang Line 3 metro.

Tunneling speed 10 meters per day the 90-meter-long steel giant dragon-shield machine has become a hero of rail transit construction. Guiyang Rail Transit Line 3, length of 43.03 kilometers and 29 stations, all underground stations.  First phase of project since TBM started in Guizhou Province on September 19 last year,  "Qianjin" successfully passed through the Guizhou-Guangzhou high-speed railway on January 9 this year, it has overcome karst geological karst cave groups, hard limestone, Difficulties such as high water pressure and geological fault zones have repeatedly traversed buildings and provided extremely valuable construction parameters for large-scale shield construction.

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