流动性是全球化与互联网时代的重要表现形态，全球城市是全面展现流动性的载体。流动性的加剧，引发了社会科学的重要转向，这是因为流动成为社会运行的常态，挑战了传统意义上的"社会"这一概念的内涵。社会的流动化，尤其是全球城市的流动性特征，无疑对社会治理提出了全新的挑战。聚焦流动性，形成新的治理观和社会想象，才能形成一个更具回应性的社会治理架构。

Mobility is an important characteristic of an era of internet and globalization, and global city is a crucial platform for such mobility. The increasing mobility has caused a significant turn in social sciences. When mobility is regarded as normal rather than abnormal, it will definitely challenge the traditional conception of "society". The mobility of society, especially that of a global city brings new challenges in social governance. We should develop a novel view of governance and social imagination so as to build a responsive social governance framework.