An investment drought in Africa brought on by the coronavirus pandemic could be coming to an end, as venture capitalists return to the continent, especially from China. After more than a year of staying away, funds are again looking at start-ups – particularly in fintech . They include OPay, a mobile-payments platform based in Nigeria which last week said it had raised US$400 million in a funding round led by Softbank Vision Fund 2, the investment vehicle of the Japanese conglomerate. It was also backed by a list of Chinese investors: DragonBall Capital, Sequoia Capital China, Source Code Capital, Redpoint…