On December 23, hangzhou Asian Games key project - Hangzhou Wenyi Road upgrading and transformation phase II project "Qianjiang" super large mud-water balance shield machine in Wuhan Shengli off the line and passed the acceptance.

On December 16, the shield interval between Jinshajiang Road station and Dongting Lake Road Station of The S1 rail line was completed, making it the first shield interval of the S1 rail line to connect two lines.

On December 10, the left line of the tunnel between Ganyue Avenue station and Lujiagou Station (hereinafter referred to as "Ganlu Section") of the northern extension section of Chongqing Metro Line 5 was successfully completed, 20 days ahead of schedule.

On the morning of December 1st, with a burst of warm applause, shenwan No.1, the first mud-water balancing shield machine of Suiguan-Shenzhen-Shenzhen intercity Railway, was successfully rolled off the production line at Nansha Plant of Railway Construction Heavy Industry. Guangzhou, Dongguan and Shenzhen Intercity Railway is the first intercity railway constructed by Shenzhen Railway Investment and Construction Group. "Shenwan No.1" is the first shield machine of Shenzhen Railway Investment and Construction Group in Guangzhou, Dongguan and Shenzhen intercity railway. The off-line of this equipment has a milestone significance for Shenzhen intercity railway construction and railway construction heavy industry.

On November 19, the whole floor of Meifu Road working well, the target of JCXSG-3 of Shanghai Rail Transit City line Airport Link Project (West section), was completed, with the last load of concrete slowly pouring in.

Recently, wuhan Hydrangshan sewage pumping station and water inlet and outlet pipeline project have been successfully completed through Nanhu Tunnel. The main body and supporting facilities are expected to be completed by the end of June 2021, which will improve the sewage collection system in the southern area of Nanhu in Wuhan.