Ah, China HSR Business Class. Lie-flat seats, and, more recently, private solo suites as well. Thing is, which carriage(s) can you find them? Over the many years, the railways have been doing a legit musical chairs in plucking a Business Class carriage in Car 3, nein, Car 9 on coupled trains, ach jein there's also one in Car 17... Let frequent traveller David Feng decode their whereabouts!