How does the establishment of SEAs influence the export of the areas in China?

Special Economic Areas (SEAs) are geographic regions which are normally characterized with more flexible laws and special policies concerning investments in SEAs, compared with the regular areas of cities. In 1979, as China’s emphasis changed to rapid economic modernization, two southern coastal provinces of Guangdong and Fujian were first picked as candidates of SEAs. In the following years, more cities were added to the list. Then, until 2006, there had been 105 SEAs across the mainland most of which locate in east coastal areas, especially the 3 biggest urban agglomerations, Beijing-Tianjin-Hebei Region, Yangtze River Delta and Pearl River Delta. These three urban agglomerations contribute to the major China’s economic growth