Industrial production in China rose 6% year-on-year in July, the government has said, far below market expectations for the world's second-largest economy.
The median forecast in a poll of 40 economists by Bloomberg News was for a 6.6% rise.
Industrial production measures output at factories, workshops and mines, and the figure also slowed from a 6.8% increase in June.
Retail sales, a key indicator of consumer spending, rose 10.5% in July from a year earlier, the National Bureau of Statistics said, just below a 10.6% forecast in the poll.
Fixed asset investment, a measure of government spending on infrastructure, expanded 11.2% on-year in the January-July period, the NBS said - also below an 11.5% median estimate, and the lowest since December 2000.
The data came as China's economy has continued to slow in 2015 after growing last year at 7.4%, its weakest pace in nearly a quarter of a century.
Growth in gross domestic product has decelerated further this year, expanding 7% in each of the first two quarters.
The central People's Bank of China cut the value of the yuan against the dollar for a second consecutive day today, moves which should make Chinese goods cheaper overseas, giving exports a potential boost.
