Globalization has become the unavoidable problem of all the cities in a global urbanhierarchy since the second half of the 20th century.
20世纪后半叶以来，全球化已经成为所有处于全球城市等级体系的大城市不可回避的问题。
2
About the Ring structure, Lapierre explained, "' the Ring 'is an installation that takes into consideration the urban space networking: the rhythm, flow, organization and spatial hierarchy."