China’s central leadership has given billionaire Jack Ma’s (??) Ant Group Co (????) a tentative green light to revive its initial public offering (IPO), two sources with knowledge of the matter said, in the clearest sign yet that Beijing is easing its crackdown on the tech sector. Ant, an affiliate of Chinese e-commerce behemoth Alibaba Group Holding Ltd (????), aims to file a preliminary prospectus for the share offering in Shanghai and Hong Kong as early as next month, the sources said, declining to be named. The financial technology giant must wait for guidance from the China Securities Regulatory Commission…