U.S.-China relations are changing so rapidly that it is hard to establish a critical position about their long-range implications. It is pleasant to think of the enmities of the past retreating into well-deserved oblivion. Looking ahead, it is tempting to see the Coca-Cola contract as a spearhead into the world's most populous common market. A billion people—eager to modernize, ready at last for Western everything, from technology to tourism. The prospect is enough to drive considerations of prudence out of sight.