Investment will continue to play a key role in energizing the Chinese economy this year, with input into manufacturing and high-tech industries playing the lead role, experts said. China's fixed asset investment grew steadily by 2.9 percent on a yearly basis in 2020 with high-tech and the social sector leading the growth, the National Bureau of Statistics said on Monday. The country's total fixed asset investment amounted to 51.89 trillion yuan ($7.99 trillion) in 2020. Investment grew by 0.9 percent in the basic infrastructure sector, but declined by 2.2 percent in the manufacturing sector, the NBS said on Monday. Investment growth in the agricultural, secondary and services sectors all turned positive last year. In particular, investment in high-tech industries grew by 10.6 percent on a yearly basis, 7.7 percentage points above the overall level. Private-sector investment stood at 28.93 trillion yuan, up by 1 percent on a yearly basis.