This paper is part of the research into the connection from grid to social orders. It attempts to explore the process of integration of immigrants and the design of grid to alleviate the conflicts between different ethnical groups. Four cases are presented to explain the process of immigrant integration. The former three are historical examples in ancient China on the ‘multi- ethnical’ cities. They are the division of clans in Western Zhou dynasty in 8th century BCE, the mix of Chinese and Nordic cultures in 13th century CE and the multi-ethnical Chinese border cities in 19th century CE. The last case is about the transformation of Chinese ghettos in Milan, Italy. Though from different historical strata and location, they all present the issue of Frontier where different ethnic groups meet, trade, conflict and finally integrate. The article will examine the cases from following aspects: the historical background, the economical, cultural and political conflicts and integration and the grid as spatial tools in creating the space for integration. Four cases share the similar model of social integration. In this process, grid is the physical interference as the reflection of the decision from rulers upon the social orders. The study is written for planners and governors who are engaged in this immigrant Frontier issues. The lessons from historical and contemporary social integration can provide possible references in the political decisions and the planning of grid. |