The key control project of the sichuan-tibet railway from Lhasa to nyingchi section, the mirin tunnel, has been successfully completed and is expected to be completed by the end of 2020.

On April 2, shenzhen metro line 12, the "pioneer wu" shield tunnel machine from the line 12 science and technology station shield tunnel receiver well broken out of the wall. This marks the smooth connection of the right line and the first shield tunnel section of the whole line of the kohai section (science and technology museum station - east station of the ocean garden). This is also the longest shield tunnel interval in the fourth phase of shenzhen rail transit project.

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 15, the second phase of rail transit line 2, from youjujie station to guigang station, was smoothly connected with the last blast of tunnel blasting. Since then, guiyang city rail transit line 2 phase ii project was completed.

On January 13, the 17.5-kilometer exit of the million (xiang) railway from China, Laos, kunming (Ming) to no.5 inclined shaft was successfully completed, and the tunnel tunneled 106,60 meters, breaking the 10,000-meter mark. This provides an important guarantee for accelerating the construction of the tunnel and lays a foundation for the tunneling.

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.