BEIJING -- Chinese state media are taking a swipe at U.S. Secretary of State Hillary Rodham Clinton, saying she is either ignorant of the facts in Africa or ignoring them.

Clinton is on trip to Africa seen as boosting U.S. relations there and questioning China's motives for its investments on the continent.

The acerbic commentary Friday from Xinhua News Agency went on to say that Clinton's "implication that China has been extracting Africa's wealth for itself is utterly wide of the truth."

China has poured billions into Africa in recent years, emerging as the continent's main trading partner and a major source of investment for infrastructure. But its presence has also sparked concerns about labor abuses and corruption.

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  • Secretary of State Hillary Rodham Clinton is greeted by South Sudan President Salva Kiir at the Presidential Office Building in Juba, South Sudan, Friday, Aug. 3, 2012. (AP Photo/Jacquelyn Martin, Pool)

  • Secretary of State Hillary Rodham Clinton meets with Bishop Elias Taban, who wrote an op-ed in the New York Times, Friday, Aug. 3, 2012, in Juba, South Sudan. (AP Photo/Jacquelyn Martin, Pool)

  • Secretary of State Hillary Rodham Clinton arrives for a news conference with South Sudan Foreign Minister Nhial Deng Nhial, FRiday, Aug. 3, 2012, at the Presidential Office Building in Juba, South Sudan. (AP Photo/Jacquelyn Martin, Pool)

  • U.S. Ambassador of South Sudan Susan Page, second from left, and South Sudan Foreign Minister Nhial Deng Nhial, greet Secretary of State Hillary Rodham Clinton on her first visit to South Sudan, Friday, Aug. 3, 2012, at Juba International Airport in Juba, South Sudan. (AP Photo/Jacquelyn Martin, Pool)

  • Secretary of State Hillary Rodham Clinton meets with South Sudan President Salva Kiir,, Friday, Aug. 3, 2012, at the Presidential Office Building in Juba, South Sudan. (AP Photo/Jacquelyn Martin, Pool)

  • Secretary of State Hillary Rodham Clinton meets with South Sudan President Salva Kiir, Friday, Aug. 3, 2012, at the Presidential Office Building in Juba, South Sudan. (AP Photo/Jacquelyn Martin, Pool)

  • Secretary of State Hillary Rodham Clinton meets with South Sudan President Salva Kiir, Friday, Aug. 3, 2012, at the Presidential Office Building in Juba, South Sudan. (AP Photo/Jacquelyn Martin, Pool)