Growth in China's industrial production, which measures output at factories, workshops and mines in the world's second-largest economy, slowed sharply to 6.9% year-on-year in August.
Retail sales, a key indicator of consumer spending, rose 11.9% in the same month on-year, the National Bureau of Statistics said.
Fixed asset investment, a measure of government spending on infrastructure, expanded 16.5% on-year in the first eight months of 2014.
The industrial output result marked an abrupt slowdown from the 9.0% recorded in July and also fell far short of the 8.7% median increase in a survey of economists by The Wall Street Journal.
Retail sales growth, meanwhile, also slowed from the 12.2% recorded in July.
Fixed asset investment, which is only released cumulatively, was below the 17.0% reading for the first seven months of the year, and also below the 16.9% forecast.