After Shangguan Qianmo left, Wei Yuan quickly forgot about her and picked up a stack of blueprints to begin reviewing the underground pipeline engineering for the various cities in Qingming. In Wei Yuan's view, the sewer system was especially important, as it was a critical factor in maintaining the quality of life for mortals and was a prerequisite for the rise of large-scale cities.
Wei Yuan still remembered his journey west, arriving for the first time in Qu Liu Town and seeing every household soaked in sewage.
Thus, while constructing the Floating Road, Wei Yuan also embarked on large-scale construction of underground pipelines. Now, the cities of Qingming were exceptionally clean and tidy, without the stench of sewage commonly found in Great Tang cities.
