Multiple metro openings in Shenzhen
https://www.railwaygazette.com/operations-and-services/multiple-metro-openings-in-shenzhen/57710.article
When I visited Shenzhen 10 years ago, the city just had 2 metro lines. But now, it has 11 lines, and both of the 2 lines have extended.
While Shenzhen is often taken up as a representative of economically growing cities, its subway system is also a representative of fast-growing subway networks in China.
