For several years the U.S. has been the second largest trading partner with Africa after China.

The volume of annual trade between China and African countries surged to 166.3 billion U.S. dollars and exports to China from African countries reached 93 billion U.S. dollars.

African countries are voicing favor for the beneficial economic ties with China.

China-Africa relations have made big progress while the U.S. reeling from economic recession has been engrossed in "war on terrorism" in Afghanistan and a nuclear row against Iran.

Much upset, the U.S. has sent delegations of American businessmen to Mozambique, Tanzania, Nigeria, Ghana, Kenya and other African countries from early this year, committing sort of energy and other aid.

In June it convened a meeting for law on growth opportunity for Africa.

It made honeyed words of rendering aid for the socio-economic progress of Africa by the law and, on the other hand, published "a new Africa strategy" aimed at the establishment of political hegemony in the African continent.

U.S. State Secretary Hillary made an 11-day tour of Senegal, Uganda, South Sudan, Nigeria, Kenya, South Africa and other countries from July 31 to realize the strategy.

She started her tour with an address on "democracy" at a university in Senegal. Her tour was consistent with interference in the internal affairs of African countries under the signboards of "human rights and democracy".

She even made comments slandering China.

She said it would be better to cooperate with more "beneficial and responsible" country rather than a country "exploiting" the resources of Africa, indirectly referring to China.

This has promptly triggered off China's rebuff.

Xinhua said that it is none other than the U.S. and other Western countries that squeeze wealth out of Africa and leave nothing behind to meet their own interests.

A South African political and international affairs expert said that in fact, the U.S. tries to curb China's influence on Africa. Noting that Hillary warned African countries of Chinese "imperialism", the expert added that still she advocates U.S. imperialism in Africa.

Analysts see that conflict between China and the U.S. over Africa will become more serious.