They are rajakar and their descendant getting true test of their Pakistan.I doubt any genuine Bangladeshi have gone that place to live.Before 1971, half a million Bengali lived in then West Pakistan, most of them repatriated after 1974.Some remained and latter joined by pro pak Bihari and Bengali who could not digest the liberation of Bangladesh.Patriotic Bangladeshi didn't stay there.Even Runa Laila came back in Bangladesh in 1974, leaving behind her popular singing career opportunity there.So did Shabnam.