BEIJING-- The People's Bank of China (PBOC), the country's central bank, auctioned 3 billion yuan ($469 million) of three-month bills at a yield of 3.161 percent on Thursday.

The yield on three-month bills remained unchanged from last week.

Also, PBOC sold 3 billion yuan worth of 91-day repurchase agreements to banks on Thursday with a yield of 3.16 percent.

Earlier on Tuesday, the central bank issued 3 billion yuan of one-year bills at a yield of 3.584 percent, higher than the benchmark interest rate of 3.5 percent for one-year deposits.

Offsetting 25 billion yuan in matured bills and repurchase agreements, PBOC released 16 billion yuan of liquidity into the money market this week through open market operations on Tuesday and Thursday.

The PBOC injected 219 billion yuan in liquidity into banks during the past six weeks despite the country's efforts at curbing rising inflation, which hit a 37-month high of 6.5 percent in July.