INTRODUCTION--Terminology ciy,Town& Village城市,乡镇,农村: City and Town in China is administratively defined as statutory cities and statutory towns judging from the population, economic, public finance and Infrastructure four aspects. village is referred to the areas other than cities and towns Birth rate( or crude birth rate)出生率 The number of live births per 1,000 population in a given year. Not to be confused with the growth rate Death rate( or crude death rate)死亡率: The number of deaths per 1,000 population in a given year Sex ratio出生人口性别比: The number of males per100 females in a population Fertility Rate生育率: The number of live births per1,000 women ages 15-44 or 15-49 years in a given year . Definition from Administrative Office of the State Council &Population Reference Bureau, USA 自强不息,厚德载物- IE(@Applied Statistics, Group Report ③,--自强不息，厚德载物-- IE @Applied Statistics, Group Report 7 INTRODUCTION--Terminology ◼ City, Town & Village城市，乡镇，农村: City and Town in China is administratively defined as statutory cities and statutory towns judging from the population, economic, public finance and Infrastructure four aspects. Village is referred to the areas other than cities and towns. ◼ Birth Rate (or crude birth rate) 出生率:The number of live births per 1,000 population in a given year. Not to be confused with the growth rate. ◼ Death Rate (or crude death rate) 死亡率:The number of deaths per 1,000 population in a given year. ◼ Sex Ratio出生人口性别比:The number of males per 100 females in a population. ◼ Fertility Rate生育率：The number of live births per 1,000 women ages 15-44 or 15-49 years in a given year. ----Definition from Administrative Office of the State Council &Population Reference Bureau, USA