people/ same country/ wear/ different kinds/ clothes.
=>People of the same country wear different kinds of clothes.
clothes/ help show/ work they do/ and whether/ rich/ poor.
=>Clothes help (them) show what work they do and whether they are rich or poor.
in/ old times/ poor working people/ wear very simple clothes/ while/ at work.
=>In the old times, poor working people wore very simple clothes while they were at work.
on/ other hand/ rich people/ wear more elaborate, colourful clothes.
=On the other hand, rich peole wore more elaborate and colorful clothes.