It was set up comprehensively as far as Song Dynasty.Dongjing is the most emblematical deputation.

可以说，经过隋唐逐步开放，直到北宋时期，才在城市中有了广泛设置，当时都城东京是最为典型表。

After the analysis and calculation to an emblematical hypothesis, we made further improvement to the model.The result validated the rationality of the model.

通过典型想定示例计算分，型进行了进一步改进与探讨，所得结果充分验证了型合理性。