China's producer price index (PPI), which measures costs for goods at the factory gate, rose 4.7 percent year on year in June, the National Bureau of Statistics (NBS) said Tuesday.

The growth rate beat market expectations of 4.5 percent and was faster than the 4.1-percent rise in May, picking up pace for three consecutive months, according to the NBS data. Month on month, the producer prices edged up 0.3 percent in June, slightly slower than the 0.4-percent rise in May.

Factory prices of both production materials and consumer goods grew faster, up 6.1 percent and 0.4 percent year on year respectively. The former contributed 4.61 percentage points to the total price increase.

Of all industrial sectors, oil and natural gas exploration saw the biggest price hike of 32.7 percent last month, followed by processing of oil, coal and other fuel at 19.9 percent, and ferrous metal smelting and pressing at 15.1 percent.

NBS statistician Sheng Guoqing said the carry-over effects resulted in a rise of 4.1 percentage points in the PPI growth, with the remainder expansion of 0.6 percentage point generated by new factors.

In the first half of this year, the PPI increased 3.9 percent from the same period in 2017.

Official data also showed that China's consumer price index, a main gauge of inflation, rose 1.9 percent year on year in June.