南京地铁交通
Nanjing Metro is a main public transportation method in the city of Nanjing and it can get you to most of the important places around. There are 10 Lines in the operation network, including 5 lines in the city area (Line 1, 2, 3, 4 and 10) and 5 suburban metro lines (S1, 3, 7, 8 and 9).
(The picture is from the official website of Nanjing Metro.)