【正确答案】 The Jinjiang River was called the Chengdu Erjiang (two rivers) during the Qin and Han dynasties, including the inner river Pijiang and outer river Jianjiang. Since the Han Dynasty the two rivers have become known by a shared poetic name, Jinjiang, meaning Brocade River. According to historical record, Sichuan weavers often washed their brocade in the two rivers because the brocade became more lustrous and bright after being washed with the water. This is why the two rivers became known as the Brocade River. This naming is also related to Dujiangyan. In the ancient Shu times, the Minjiang River became muddy and ran off rampantly, turning the area into marshes after it entered the Chengdu Plain, making farming on the plain impossible. The Dujiangyan Water Project made use of the two rivers as water diversion channels for irrigation. As a result, the muddy waters became clear enough for local weavers to wash their brocade. Both the Dujiangyan and Jinjiang were cradles of the urban civilization of Chengdu, since the former converted the submerged Chengdu Plain into an expanse of fertile farmland and the latter brought prosperity and affluence to the city of Chengdu. The beauty of Chengdu attributes to the wonderful natural conditions of Jinjiang, which can be described by a line from a Chinese poem "The water and the sky are blue without a seed of dust, the scenery and climate are even better than Shaanxi."