Annotations:
1. Explanatory Notes
Producer Price Index for manufactured goods consists of producer price index and purchaser price index.
The industrial producer price index reflects the trend and level of prices change when the products are sold for the first time.
The industrial purchaser price index reflects the trend and level of prices change for the products purchased by the industrial enterprises as intermediate inputs.
2. Statistical Coverage
The factory price survey of industrial producers covers the prices of industrial products in 40 major industrial categories and more than 1300 basic categories; the purchase price survey of industrial producers covers the prices of industrial products in 9 major categories and more than 800 basic categories.
3. Survey Methods
The industrial producer price survey adopts the method of combining key survey with typical survey, involving more than 40000 industrial enterprises in China.
4. Statistical Standard
Industrial Classification is based on the [Industrial Classification for National Economic Activities" (GB/T4754-2017).
5. Data Description
Due to "rounding-off", sometimes the aggregate data is the same as the high or low value of the classified data.
6. Base Period Rotation
According to the provisions of the statistical system, China's industrial producer price statistical survey has a base period rotation every five years, and the price index with 2020 as the base period will be compiled and released from January 2021. Compared with the previous round of base period, the survey classification catalogue, representative specifications and survey enterprises in the new base period have been adjusted, and the classification weight has also changed to reflect the latest changes in the industrial production structure. It is estimated that the average impact of base period rotation on the year-on-year index of each month is about 0.05 percentage point, which is within the statistical acceptable range.