Wholesale prices rose 3.39 percent year-on-year in December, their fastest pace in two months, government data showed on Monday.
The data compared with a 3.50 percent annual rise forecast by economists in a Reuters poll. In November, prices rose a provisional 3.15 percent.
Last month, wholesale food prices fell 0.70 percent year-on-year, compared with a provisional 1.54 percent gain in November.