NBS did not provide figures for infrastructure investment. But Sun said growth has been kept stable. A CITIC report showed that infrastructure investment will maintain a growth rate of 25 percent throughout the first half of the year.

Infrastructure, property and manufacturing investment together accounted for 80 percent of the country's total fixed asset investment, according to a report of Cinda Securities.

Experts believed the fixed-asset investment growth is not likely to gain strong momentum in the coming months

Peng Wensheng, chief economist at the China International Capital Corp. (CICC), said falling prices of industrial goods and surplus production capacity will lead producers to put off some investments.

China's producer price index (PPI), an index tracking changes in prices that producers charge for their output, fell 2.6 percent year on year in April.

The investment in the manufacturing sector is not likely to get back to the fast track until there is a turnaround in PPI and the problem with overcapacity is addressed, said Peng.

Sun said investment in the infrastructure and property sectors will remain stable. Property investment will maintain a 21 percent growth rate in the coming months, given an improvement in the number of newly-launched projects in April.

Sun said although the government has recently conducted tightening of the property sector, April figures showed that the real estate sector did not slow down. Investment in property developments will continue to support China's investment growth.