China's industrial value-added output rose 9.2 percent year-on-year in May, down from April's 9.3-percent increase, the National Bureau of Statistics said Sunday.

Value-added industrial output measures the final output value of industrial production, or the value of gross industrial output minus intermediate input, such as raw materials and labor costs.

In the first five months, total industrial value-added output increased 9.4 percent year-on-year, compared with the 9.5-percent growth rate registered for the first quarter of the year.

Sunday's NBS data also showed that China's heavy industries expanded 9.8percent year-on-year in May, while its light industries posted output growth of 8.0 percent from a year earlier.

Analyzed by ownership, the industrial output of state-owned enterprises expanded 4.4 percent, while that of collectively owned companies grew 4.0 percent, compared with 10.7 percent for stock-holding companies and 8.1 percent for overseas-funded firms.