BEIJING, June 10 (Xinhua) -- China's producer price index (PPI), which measures costs for goods at the factory gate, went up 3.9 percent year on year in May, the National Bureau of Statistics (NBS) said Wednesday.

This photo taken on July 12, 2025 shows the "intelligent mega-factory" of Jinko Solar Co., Ltd. in Shangrao City, east China's Jiangxi Province. (Photo: Xinhua)

On a month-on-month basis, PPI rose 0.5 percent in May, down from 1.7 percent in April, the NBS data showed.

NBS statistician Dong Lijuan, in an analysis of the changes in PPI last month, said the optimization and upgrading of the industrial structure drove up prices in some sectors, seasonal increases in demand led to price rises in certain industries, and fluctuations in international crude oil prices caused prices in some industries to either turn from increases to decreases or see their growth moderate.