What do New York City, London and Shanghai all have in common?
Their current metro systems will be eclipsed in size by Shenzhen's, if everything goes according to a plan that sets out an ambitious vision for Shenzhen public transport in 2030.
The plan, posted on an official Shenzhen government website, outlines a goal of 32 lines, including eight express lines and 24 regular lines by the end of 2030. They would bring the length of the Shenzhen metro system to almost twice the size of Shanghai's current system, the world's longest.
Shenzhen's planned system would span 1,142 kilometers including express lines connecting remote areas of Shenzhen with the CBD and connecting to Huiyang District in Huizhou.
The Shenzhen Metro currently has eight lines spanning about 285 kilometers, making it the ninth biggest metro system in the world, after Madrid.
Click here for a full view of the planned 2030 Shenzhen Metro.