Growth in China's industrial output, retail sales and fixed asset investment all fell to multi-year lows during January and February.
Industrial output, which measures production at China's factories, workshops and mines, rose 6.8 per cent year-on-year in the two months, the National Bureau of Statistics said on Wednesday.
It was the lowest since a reading of 5.7 per cent in December 2008, according to previous figures.
Retail sales, a key indicator of consumer spending, gained 10.7 per cent during the period from the year before, the NBS said, the worst since 9.4 per cent in February 2006.
And fixed asset investment, a measure of government spending on infrastructure, expanded 13.9 per cent, it added - the lowest for 13 years, since 13.7 per cent for the whole of 2001.
Released as a means of smoothing distortions attributed to the recent Lunar New Year holiday, the two month's worth of official data comes as the world's second-largest economy expands at its slowest pace in a quarter century.
The figures are the latest snapshot of the health of the Asian colossus, a major driver of the global economy but which is in a delicate transition phase away from decades of frequent double-digit annual growth.
China's gross domestic product (GDP) expanded 7.4 per cent last year, the worst result since 1990, and last week leaders lowered the country's 2015 GDP growth target to "approximately seven per cent", from last year's objective of about 7.5 per cent.
Data so far this year have indicated a further slowing and the People's Bank of China cut benchmark deposit and lending interest rates in late February for the second time in three months, citing "historically low inflation".
The gain in industrial output fell short of a median expansion of 7.7 per cent in a survey of economists by Bloomberg News.
The National Development and Reform Commission, China's top economic planning agency, last week cut the target for fixed asset investment growth to 15.0 per cent in 2015 from last year's 17.5 per cent, in line with authorities' stated aim of restructuring the economy.
Consumer inflation rebounded in February from a more-than-five-year low, official data showed on Tuesday.
But a further plunge in factory gate costs, a leading indicator for retail prices, compounded nagging worries that China could soon face debilitating deflation.
Analysts attributed the rise in consumer inflation to 1.4 per cent largely to one-off effects related to the Chinese Lunar New Year, and expect increases to moderate in coming months.
