There are fifteen free trade zones

There are fifteen free trade zones whose performance has been uneven.
Shanghai, Shenzhen, Tianjin, Zhangjiagang, Ningbo and Dalian have developed
better than others. Some FTZs have been impacted by the high price of materials,
thereby experiencing slow growth. Meanwhile, trading companies are heavily
affected by national policies, which cause free trade zones some challenges in
absorbing customers. Furthermore, export processing zones, free trade port zones
and special customs supervision zones also have some functions as a free trade
zone. This further increases the pressure on those FTZs in China