Social security fund sees 13.22% investment return

China's national social security fund saw an investment return of 13.22 percent last year, earning 390.67 billion yuan ($58 billion).

The National Council for Social Security Fund, which manages the assets of the national social security fund, said in its annual report that the total assets of the fund had reached 3.81 trillion yuan by the end of last year.

The fund is designed to supplement and balance social security expenditures, particularly for old-age insurance.