In February Beijing will host the Olympic Games again, this time amid a surging pandemic, a new wave of lockdowns, at least 10 diplomatic boycotts, and international alarm at the disappearance of one of the country’s top athletes. “Together for a Shared Future,” read the words beneath the interlocking rings this year. But what will be shared and how and with whom seems infinitely more vexed a question than at any time since the Olympic torch last blazed down the Avenue of Eternal Peace.