When the four special zones were established, they all had a purpose and focus: Zhuhai mainly attracted Macao businessmen; Shenzhen and Shantou are mainly aimed at Hong Kong businessmen; Xiamen mainly faces Taiwan Province. The purpose of the four special zones is to attract foreign investment and overseas Chinese capital from all over the world. Among the four special zones, Shenzhen, Zhuhai and Xiamen have an obvious feature-their geographical location is very close to the more developed cities in Hong Kong, Macao and Taiwan, among which Shenzhen and Zhuhai are directly adjacent to Hong Kong and Macao. This geographical proximity will have the most direct impact on the future development of these three special zones-the theoretical basis comes from one of the fourteen theories of geography-that is, the closer they are, the greater their mutual influence will be. Why Hongkong, Macau and Taiwan Province Province? Because at that time, they were all the territory of China and had become international cities, and their social and economic prosperity was more prosperous than that of any city in Chinese mainland. that this is not the important question. The key point is that due to historical reasons, many Hong Kong, Macao and Taiwan compatriots are related to the mainland itself, more or less related to relatives and friends. Therefore, the biggest purpose of setting up special zones is to use the "overseas" overseas Chinese relations of the four special zones to attract overseas Chinese and foreign investment. Developing the economy of the special zone-opening up is not the slogan of "opening up", but a large number of foreign capital and talents will really flow in. Only by making good use of the link of "overseas Chinese capital" can the economic construction of the special zone develop step by step.