BEIJING, July 20 (Xinhua) -- The value of bonds issued in China last month totaled 4.1 trillion yuan (about 606 billion U.S. dollars), up from 3.8 trillion yuan in May, official data showed Friday.

Treasury bond issuance stood at 384.4 billion yuan, while local government bond issuance was 534.3 billion yuan, according to the People's Bank of China (PBOC).

Financial bonds issued last month were valued at 350.5 billion yuan, and corporate debenture issuance was 435.8 billion yuan.

By the end of June, total bonds outstanding reached 79.4 trillion yuan.

China has the world's third-largest bond market, which is growing rapidly and opening wider to overseas investors.

Last year, China issued bonds worth 40.8 trillion yuan, up 12.9 percent from the previous year, according to PBOC data.