At 10:00 am on June 9, with the shield machine slowly rotating, nantong rail transit line 1, 03 standard jiangcheng section (jianghai avenue to chenggang road), was successfully completed, which was the first section of nantong rail transit line 1 to be completed.

11 PM on May 30, "peony" 18, shield machine to break ground on the west side of jiefang road station of metro line 1, smooth completion of city park to jiefang road station line tunnel excavation task, mark the line 1 2 blocks built six shield interval construction task is complete, become the first complete line 1 all range of shield construction task blocks.

In the early morning of May 22, 2019, as the cutter plate of the shield tunneling machine slowly drove out of the tunnel, the shield tunneling section of the right line between jingdong avenue station and liangwan station area of nanchang metro line 3 was successfully completed. At this point, line 3 has successfully completed the completion of 17 single tunnel.

At 12:30 on May 17, the tunnel of the left line between the first phase of line 17, wuho hospital station and fengxihe station area, was successfully completed, becoming the third tunnel of line 17 and the first section of chengdu metro to adopt the shaft free spiral shield tunnel.

On May 9, good news came from China railway 21st bureau group. Recently, lanzhou rail transit line 2, the first phase of dingxi road to wulibu left line tunnel implemented by the bureau rail company was successfully completed, marking a crucial step in shield tunneling.