21 Cities Brief Introduction      ¢ñ. The data in this chapter show the scale, growth rates, economic efficiency, and overall level of social development, economic development and urban construction of cities in Guangdong Province.ª¥      ¢ò. The data in this chapter are provided by the Division of Comprehensive Statistics of Statistics Bureau of Guangdong Province.      ¢ó. The data in this chapter are reported, tabulated and processed by the bureaus of statistics of 21 cities at or above prefectural level in accordance with the¡°Statistical Reporting Scheme on Basic Social and Economic Situations of Cities¡±stipulated by the National Bureau of Statistics. The statistical coverage includes the urban districts of the 21 cities under the jurisdiction of the provincial government. As for Shenzhen, Zhuhai, Dongguan, Zhongshan and Foshan, statistics of the whole cities are covered, including towns and villages.