"Consumer Price Index (CPI) is an index that measures the price changes of a basket of goods and services purchased by consumers within a certain period of time. CPI is usually used to measure changes in consumer price levels and is a measure of inflation or inflation. One of the important indicators of austerity. The calculation method of consumer expenditure price index is to compare the average price of goods and services purchased by consumers in a certain period of time with the price of the base period to obtain a price index.

Changes in the consumer expenditure price index are affected by various factors, including market supply and demand, changes in raw material prices, changes in labor costs, and monetary policies. If the consumer expenditure price index continues to rise, it may lead to higher commodity prices, which will promote inflation; if the consumer expenditure price index continues to fall, it may lead to lower commodity prices, which will have a negative impact on economic growth.

Domestically, China's consumer expenditure price index is released by the National Bureau of Statistics, including urban consumer price index and rural consumer price index. Among them, the urban consumer price index reflects the changes in the prices of goods and services purchased by urban residents; the rural consumer price index reflects the changes in the prices of goods and services purchased by rural residents.

In recent years, China's consumer expenditure price index has fluctuated greatly. In 2019, China's CPI generally showed a moderate upward trend, mainly due to the impact of rising pork prices. In 2020, due to the impact of the new crown pneumonia epidemic, China's CPI has experienced significant fluctuations. The year-on-year growth rate of CPI in January and February was above 5%, and negative growth occurred in March and April. With the epidemic under control, China's CPI has gradually returned to a steady growth trend.

In short, the consumer expenditure price index is an important economic indicator, which can help us understand the trend of commodity prices, predict inflation and deflation, and provide reference for the government and enterprises to make corresponding economic decisions. "