For hard-sleeper, 2 sets beds,and one set has 3 levels--upper,middle,lower,as cheaper as higher,and the space is opening.
For soft-sleeper,also 2 types, one is common type--has 2 sets beds,upper and lower of each set.
the other one is senior type--only 2 beds,upper and lower . And soft-sleeper has independent space,not opened.chest and washroom,also other service.
About the main difference between hard and soft seat, one is no standing ticket in soft seat coach,but hard seat coach has. two,the soft seat space is larger than the hard seat and more comfortable seat. also other good service.