The measure, which gauges output at the country's factories, workshops and mines, rose 5.4 per cent year-on-year in January and February.
The figures were the weakest since November 2008 as China seeks to effect a difficult transition from an investment and export-driven growth model to one led by consumer spending.
Despite the darkening outlook the People's Bank of China governor Zhou Xiaochuan told reporters today that there was no need for "excessive" monetary stimulus to hit the government's target of at least 6.5 per cent growth over the next five years.
Results fell short of economists' expectations, according to a survey by Bloomberg News, which predicted a year-on-year increase in retail sales of 10.9 per cent, while industrial production was projected to expand 5.6 per cent.
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NBS analyst Jiang Yuan blamed the disappointing industrial output data on sluggish foreign demand, the government's efforts to cut pollution-heavy production of steel, cement and coal and slumping output of tobacco products.
The NBS released statistics covering two months to smooth out distortions due to China's Lunar New year holiday last month.
Wang Baobin, another NBS analyst, attributed accelerating fixed-asset investment to government policies and construction projects to support the economy and a pickup in property investment growth to three percent compared to one percent for all of 2015.
"The government continued to earmark funds at the start of this year to accelerate the start of a series of major constructions," Wang said.