China: Metro openings hit record high
https://www.railwaygazette.com/long-reads/china-metro-openings-hit-record-high/58572.article
Most of the metro systems in China are opening between 2010 and 2020. It means most of them will experience renovation work at the same time.
It will be 20 or 30 years later. Then, China can afford to concentrate on it under low fertility rate?
Subway planners should consider that.
