成都平原的中江与前、后江郭声波成都平原及其周边地区，皆属于岷江——川江水系，古时河流取名常与“江水”相关涉，所谓“南、北江”、“大、小江”、“内、外江、“前、后江”及“中江”之类冠以方位、地位限制词的“江”名层出不穷，并且频有变改，令治史者十分头痛。... The middle and lower reaches of the Chengdu Plain and the front and rear Guozhengbo Chengdu Plain and their surrounding areas all belong to the Minjiang River and the Chuanjiang River system. In ancient times, the river was often referred to as “the river”, and the so-called “south and north rivers” “” Inside and outside the river, “before and after the river” and “Zhongjiang” like crown, status restrictions word “river” after another, and frequent changes, so that history is very headache ....