A breakdown of the data showed that food prices dropped 3.8 percent year on year, a decline 2.6 percentage points higher than that in December 2021.
The core CPI, which excludes food and energy prices, gained 1.2 percent year on year, flat with a month ago.
Wednesdays data also showed the countrys producer price index, which measures costs for goods at the ctory gate, went up 9.1 percent year on year in January.
Chinas consumer price index (CPI), a main gauge of inflation, rose 0.9 percent year on year in January, down from the 1.5-percent increase a month ago, the National Bureau of Statistics said Wednesday.
Non-food prices rose 2 percent from a year earlier, eased from the 2.1-percent increase reported in the previous month.
The price of pork, a staple meat in China, slumped 41.6 percent year on year, compared with a 36.7-percent decrease a month ago.