However, it is raising eyebrows because of the highly cyclical nature of the industry, famous for swinging from big profits in boom times to flirting with losses in economic slumps.

• 然而，这也令人担心，因为这个行业具有很强的周期性，以盈亏波动剧烈而著称，在繁荣时期能获得巨额利润，在经济衰退期会轻易转为亏损。