DAWIT ENDESHAW AFRICA should not be an arena for competition between world powers, China's Foreign Minister Qin Gang said on Wednesday, opening a new headquarters for a pan-African health body at the start of a five-country Africa tour. Qin visited facilities of the African Union in Addis Ababa, including the new headquarters of the Africa Centres for Disease Control and Prevention. China financed the complex's construction, as it previously did for the headquarters of the AU itself, also based in the Ethiopian capital. China has been Africa's largest trading partner for over a decade. It competes for influence with the…