SHANGHAI (Dow Jones)--China's central bank said it sold CNY135 billion ($19.77 billion) worth of bills and repurchase agreements in Tuesday's open market operation.

The People's Bank of China said in a statement it sold CNY85 billion worth of one-year bills at 1.7605%, unchanged from the rate on the one-year bills it sold in the past five weeks.

The PBOC also sold CNY50 billion worth of 28-day repos at 1.18%, unchanged from the rate on the 28-day repos it last sold Sept. 1.

The PBOC carries out regular open market operations Tuesdays and Thursdays.

This week, CNY285 billion worth of bills and repos mature, up from CNY265 billion last week.

Last week, the central bank injected a net CNY40 billion into the money market through its open-market operations.