he People's Bank of China (PBOC), or the central bank, auctioned 55 billion yuan (8.1 billion U.S. dollars) of one-year bills at its regular open market operations Tuesday.

The yield of the one-year bill stood unchanged at 2.0929 percent compared with the central bank's last one-year bill issuance on June 8.

Some 144 billion yuan (21 billion U.S. dollars) of Chinese central bank bills and repurchase agreements are due to mature this week.