On March 19, Nanjing Metro carried 3.179 million passengers, including 920,000 on line 1,788,000 on line 2,738,000 on line 3,226,000 on line 4,189,000 on line 10,89,000 on Line S1,96,000 on Line S3, and 11,000 on Line S7, s 8 Ning antenna 105,000, s 9 Ning high line 17,000. The construction of the city's rail network is set for an unprecedented "explosion" this year, with 15 lines expected to be built by the end of the year, according to Nanjing's recently released 2021 plan. Among them, Metro line 11, Ningma Intercity Section (Nanjing Section) , Ningyang Intercity Section (Nanjing Section) , Ningchu intercity section are officially new construction projects this year, while line 2 West Extension and Ningju intercity section will be completed and opened to traffic within this year. Concentrated "force" 15 lines have "exquisite" 15 lines built together, in the construction of 300 km, unprecedented, almost the whole city "everywhere bloom. Why is the construction of Nanjing Rail Transit so urgent? Chen Xuewu, a professor and professor at the School of Communications at Southeast University who has been involved in the new round of planning for the construction of Rail Transit in Nanjing, said that the extension of the tracks plays an important role in supporting regional development, "For example, the West extension of Metro Line 2, which will open to traffic this year, has a very positive significance for the development of the Onans region and the integration of the Hexi regional plate drive; the Ningju intercity has further strengthened the link between Nanjing and the metropolitan area, and has enhanced the urban space and radiation. And the second phase of line 10, which is accelerating construction, has driven and connected the development of the southern new city and the Zidong area, which are the key points of urban development and construction.at present, Nanjing has built 10 subway lines, in the domestic first to achieve the "district-to-metro. ". "The 15 rail lines involved in the major transport projects in Nanjing, including the Old City's encrypted line 5 and other lines, as well as new urban lines such as the Longitudinal Route 11, which is leading the development of Jiangbei New District, and the nanjing-ma intercity line, which supports the Nanjing Metropolitan Circle, will further expand the coverage and competitiveness of the Nanjing Metro, " said Li Tengfei, a domestic urban transport planning expert. The Development Plan of Nanjing Metropolitan area, which was just approved by the National Development and Reform Commission on February 8, proposes to build a "metropolitan area on the track" . This year's 15 rail transport projects, Ningju, Ningma, Ningtian, Ningyang, Ningchu are inter-city projects. It can be predicted that in the future, the total mileage within the urban area of Nanjing's Rail Transit may be limited by the size of its territory, and there is a gap with cities like Wuhan and Chengdu. However, in the construction of Intercity Rail Transit in the metropolitan area, nanjing, as a regional center city, is expected to lead the construction of Intercity Rail Transit in China. In the future, the pattern of Nanjing Rail Transit will be more three-dimensional. In 2019, the total mileage of subway lines in operation in Nanjing reached 378 kilometers, which was then the fourth largest in the country after Beishangguang. But in the two years since then, Nanjing has not opened a new line. Chengdu's subway system reached 554 kilometers in 2020, overtaking Nanjing to become the fourth-largest in the country, while Shenzhen rose to fifth with a total of 431 kilometers and Nanjing dropped to sixth, according to data updated in January by the National Rail Transit Network. Wuhan, a close second, is less than 20 km from Nanjing. Next, Chongqing's seven rail lines will open at the same time, threatening to squeeze Nanjing into seventh place. This made the people of Nanjing feel anxious. Did the subway construction in Nanjing Become "slow" ? Some objective reasons, such as complicated geological conditions, the need of cultural protection, and the difficulty of demolishing old urban areas, are the "speed reducers" of Nanjing Rail Transit Construction. Overcoming all kinds of difficulties and dangers, the construction of Nanjing Rail Transit is speeding up. Recently, a number of subway lines in Nanjing broke new news: Subway Line 6(Fuguishan station) began housing expropriation; subway line 7 caochangmen station is expected to be demolished in 2021; The subway line 3 KAZIMEN station entrance 3 will be officially closed from March 15, marking an important progress in the second phase of line 10... after 2023, the total operating mileage of the Nanjing subway is expected to reach 593 kilometers until 2030, the city will complete 25 subway lines, with a total length of 1,011.2 kilometers, and is expected to return to the top five in the country.