This gigantic and arduous house renovation project is rarely found in the world urban construction history. 這一龐大而艱巨的危舊房改造計劃，在世界城市史上是少有的。
However, in Chinese ancientry city history, we find that public leisure places all long disposte relatively edge status in cities, especially in capital before Tang Dynasty. 但在中國古代城市史中，我們發(fā)現，這一空間類(lèi)型在城市中，尤其是唐代以前的都城中一直是處于較為邊緣的地位的。
