Whilst the service runs a premier
train (which alludes to semi-luxury and costs a lot more than our
sleeper compartments), the economy
sleeper train wasn't doing so well, so they reduced the number of
sleeper compartments (each has six 4 - person compartments and two 2 - person coupés) and, it seems, added them to the sitter «economy»
trains; nine sitter compartments — each of which take 18 rows of 4 seats (I'll leave you to do the maths) and called it a
tourist train.