We have a better understanding of the construction of Nanjing Metro. Line 7 is a special line. Room 1 is the first driverless line, and Line 7 is divided into two sections by general contracting. One is China Railway Construction, one is China Railway Construction, and two are leading state-owned enterprises. At present, Line 7 is progressing in an orderly manner, and the construction period is normal, which can meet the contract period and ensure the smooth opening of the train in 2022
