China's top economic planner has approved 20 fixed-asset investment (FAI) projects with combined investment totaling 51.6 billion yuan (about 7.48 billion U.S. dollars) in May, official data showed Monday.

The projects were mainly in high-tech and transportation industries, according to Meng Wei, spokesperson for the National Development and Reform Commission.

China's FAI remained basically stable in the first five months of the year thanks to the robust high-tech investment.

The FAI grew by 5.6 percent year on year during the January-May period, with investment in high-tech manufacturing and services surging by 10.2 percent and 15.6 percent year on year, respectively.

The FAI includes capital spent on infrastructure, property, machinery and other physical assets.