The yield on renminbi bonds has been good since the start of the year, attracting foreign investors to increase their holdings, an official with the State Administration of Foreign Exchanges said on Tuesday.

Up till now, foreign holdings of domestic renminbi bonds have exceeded 640 billion U.S. dollars, reaching a historic high, Li Hongyan, deputy head of the administration, told a press conference.

"Overall, holdings of renminbi assets by foreign capital help to diversify the participants in the domestic market, enhance market liquidity, and promote a more active and international development of the domestic capital market," Li said.

The administration will continuously improve investment facilitation, create a favorable investment environment, promote high-level financial opening up to the outside world, and actively support foreign investors in participating in the Chinese capital market, Li added.