Bonds valued at 469 billion yuan ($67 billion) were issued on the inter-bank market in the first quarter, up 51.71 percent year-on-year, according to the People's Bank of China, the central bank.

Most of the increment came from policy financial bonds and short-term bonds, the central bank said.

The total included 84.91 billion yuan worth of treasury bonds, 267.76 billion yuan worth of policy financial bonds and 111.59 billion yuan worth of short-term bonds.

Bonds with a term of one year or less accounted for 111.59 billion yuan, or 23.79 percent; those with a term of one year to 10 years made up 271.49 billion yuan, or 57.88 percent, and those with a term of more than 10 years, 115.47 billion yuan, or 24.62 percent, the bank said.

Between January and March, the inter-bank loan market was 3.51 trillion yuan, up 264.61 percent year-on-year.