China's urban fixed asset investment climbed 21.5 percent to 2.1189 trillion yuan (336 billion U.S. dollars) in the first two months of 2012 from a year earlier, the National Bureau of Statistics (NBS) said Friday.

The growth rate, down 2.3 percentage points year on year, dropped to the lowest level since 17.4 percent in 2002, official data showed.

During the Jan.-Feb. period, investment in the primary industry jumped 43.9 percent year on year to reach 30.4 billion yuan.

Investment in the secondary industry totaled 893.9 billion yuan, up 24.9 percent, while that in the tertiary industry expanded 18.5 percent to 1.1946 trillion yuan.

Investment in the country's central regions increased 28.4 percent, followed by 28 percent in the western regions.

The more developed eastern regions registered an 18.8-percent increase in investment to hit 1.1619 trillion yuan, roughly 2.5 times the central region's total.