CPI是居民消费价格指数的简称,它反映的是一个国家或地区居民消费的商品和服务项目的价格变化情况。通过CPI,人们可以观察和分析消费品的零售价格和服务价格变动对城乡居民实际生活成本的影响。例如今年7月份全国CPI为103.3,这表示中国人生活支出的价格水平比2009年7月上涨了3.3%,也就是说今年要花费103.3元才 CPI is the abbreviation of the consumer price index, which reflects the price changes of the goods and services consumed by residents in a country or region. Through CPI, one can observe and analyze the impact of changes in retail prices and service prices of consumer goods on the actual cost of living for urban and rural residents. For example, in July this year, the national CPI was 103.3, which means that the price level of Chinese people’s living expenses rose by 3.3% over July 2009, which means that it costs 103.3 yuan this year