Shenzhen Metro 12 line starts from Zuopaotai Station and ends at Haiyuan East Station, passing through Nanshan and Baoan Administrative District. The total length of the line is about 40km, and it is laid underground, with 33 stations and 20 transfer stations (including long-term planning). The maximum running speed of the line is 80km/h, and it is positioned as a general speed line.