China's fixed-asset investment saw steady growth in the first quarter of this year, bolstering overall economic growth, official data showed Monday.

Fixed-asset investment jumped 9.3 percent from a year earlier to 10.49 trillion yuan (about 1.65 trillion U.S. dollars) in the first three months, the National Bureau of Statistics said in a statement.

The growth slowed from a 12.2-percent increase registered in the first two months. In March, fixed-asset investment increased 0.61 percent from a month earlier.

Monday's data showed that China's gross domestic product grew 4.8 percent year on year in the first quarter of this year.