Sentence:  Chinese administrative "cities" were often the location of more than one yamen, each with its own territorial jurisdiction. For instance, Yangszhou was not only the seat of the Pacificiation Commission ("xuanweisi") of Huaidonglu, but also the capital of the Yanzhou <WSD>Route</WSD> ("lu") subordinated to the Pacification Commision.  Morevover, it was the administrative seat of Jiangdu District, which was subordinated to the Yangzhou <WSD>Route</WSD>. 
Meaning of the word marked with <WSD> tags:  One of the major provinces of imperial China from the Later Jin to the Song, corresponding to the Tang and early Yuan circuits.