https://www.reuters.com/article/us-china-ant-group-jack-ma/jack-mas-disappearing-act-fuels-speculation-about-billionaires-whereabouts-idUSKBN2991DA >Alibaba founder Jack Ma's absence from public view in the past two months, including missing the final episode of a TV show on which he was to appear as a judge, has fueled social media speculation over his whereabouts amid a Chinese regulatory clampdown on his sprawling business empire.