"Producer Price Index (PPI) is an index that measures changes in the price of goods sold by producers within a certain period of time. PPI is usually used to measure changes in the price level in industrial production and is a measure of inflation or deflation One of the important indicators. The producer price index is calculated by comparing the average price of commodities sold by producers in a certain period of time with the price of the base period to obtain a price index.

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

Domestically, China's producer price index is released by the National Bureau of Statistics, which is divided into two categories: industrial producer price index and production means price index. Among them, the ex-factory price index of industrial producers reflects the price changes of industrial products, including industrial products, agricultural and sideline products, and consumer goods; goods etc.

In recent years, China's producer price index has fluctuated greatly. In 2016, China's producer price index showed positive growth for the first time, indicating that industrial product prices have picked up. In 2017, the producer price index continued to rise, mainly due to rising raw material prices and supply-side reforms. In 2018, the producer price index fell, mainly due to the impact of the US trade protectionist policy. In 2019, the producer price index rebounded again, mainly due to the government's policy of increasing infrastructure investment and stabilizing growth. "