Some of the line networks that are connected/across multiple municipalities are listed together, just write one of them; other line networks are listed separately (they will not be displayed in other answers after being separated as answers), whichever is the specific case.
Excludes trams, includes urban/intercity railways that operate as subways and do not have cross-line trains; includes Hong Kong, Macao and Taiwan
Length in kilometers; The background color is roughly based on the opening year and time period.