When Deng Xiaoping initiated his Opening Up Policy, Xiamen was made one of the first four special economic zones in 1980, with special investment and trade regulations attracting foreign investment, particularly from overseas Chinese. The construction of Huli Export Processing Zone in Xiamen Special Economic Zone was officially started on 15 October 1981. In 1984, Xiamen Special Economic Zone was expanded from an area of 2.5 square kilometers of Huli to 131 square kilometers of the whole island. The city grew and prospered. In June 2010, Xiamen Special Economic Zone was expanded to the whole Xiamen city, and four districts outside Xiamen Island – including Jimei, Haicang, Tongan and Xiang'an – were included into the zone. After this expansion, the area of Xiamen Special Economic Zone reached 1,573 square kilometers, 11 times larger than before.