Because of the poor quality, they can't export them and earn foreign exchange, and because they're short on foreign exchange, they haven't been able to renovate their equipment.
品質差就無法外銷，不能外銷就沒有外匯，因此儘管他們重工業的規模都很大，但因為外匯短缺，多少年來設備幾乎沒有更新過。老舊的設備能源消耗大，致使產品在國際上的競爭能力也不夠強。也有「友誼商店」