Chinese President Xi Jinping warned that Africa’s resources should not be used as a tool for geopolitical rivalry, as the United States steps up efforts to secure critical minerals on a continent where Chinese companies have major mining interests. “Africa’s resources belong to Africa,” Xi told Botswana’s President Duma Boko in Beijing on Tuesday, according to Chinese state news agency Xinhua. He said it was a “historical injustice” that an unfair international division of labour had left the...