The Economist cites a CGD working paper on China's foreign assistance.
From the article:
"China’s assistance programme is the most active. In 2007 its leaders said they would offer African countries $20 billion in new financing (they did not say on what terms or over what period). Hu Jintao, the president, repeated a promise to boost aid and cancel debts during a trip to Africa this February. The World Bank says China already gives Africa $2 billion a year (more than the bank itself does). China does not publish aid figures and a study in 2007 for the Centre for Global Development, a think tank in Washington, DC, put the figure lower, at $1.5 billion-$2 billion a year (with a third to a half for Africa). But all estimates agree that aid has been rising relentlessly (see chart) and that China, once a recipient, is now in the middle rank of donors, on a par with Australia or Spain, though with more commercial lending."