On March 31, shenzhen rail transit line 14, ao da interval (ao bei station - dayun station) left line shield tunnel, baobao interval (baohe station - baolong station) left line shield tunnel successfully started on the same day.

On January 9, it was learned that, with the steady tunneling of "qianjin" shield tunneling machine, guiyang line 3 civil engineering project department of 14th bid successfully completed the construction task of running down the guiyang-guangzhou high-speed railway, declaring the first shield tunneling machine in guizhou province to successfully run down the guiyang-guangzhou high-speed railway.

Recently, "hongrun 22" shield tunneling machine broke through the shield well at chencun north railway station, marking the smooth completion of the left line tunnel between guangzhou south railway station and chencun north railway station in the west extension of guangzhou metro line 7. On December 19, 2019, "hongrun 23" had successfully completed the construction of the right-line tunnel. Since then, the tunnel between guangzhou south railway station and chencun north railway station in the west extension of line 7 has been connected by two lines.

Recently, the construction of hefei rail transit line 4 has made new progress. On December 24, the left line of fenglehe road station and yulan avenue station was connected, which became the 36th single-line tunnel of line 4. On December 30, the double-line shield tunneling machine from science avenue station to qimen road station passed through hewu railway and hefu high-speed railway.

On December 20, with the completion of the laying of the last pair of tracks on the left side of the water park station to nuo wo mulle station, the first phase of the Hohhot urban mass transit line 2 project under the general contract of China railway construction group and the construction of China railway 16th bureau group was completed.

At the construction site of pazhou west section of guangzhou metro line 18, the cutter began to dig slowly, marking the first time that the fastest subway tunnel in China will cross the pearl river for a long distance. This shield tunneling machine will propel more than 1600 meters under the pearl river in an s-shaped manner, which will be the first time to challenge the long distance and small radius crossing the pearl river system in the field of underwater tunnel construction in China.