However, ancient Chinese scholars were accustomed to sitting back and talking, ignoring on-the-spot inspections of the natural world. Their understanding of the Yellow River was mostly limited to what they saw in front of them and hearsay. Meng Jiao of the Tang Dynasty "Who opened the source of Kunlun? The Chaos River flows out" (Meng Jiao: "The Yellow River"), and Wang Anshi of the Song Dynasty "Sent the Kunlun five-color stream, a yellow turbidity runs through Zhongzhou" ("Yellow River") and other poems are just the imagination of literati do.