It is better to understand that the Yangtze River seals its throat. It is not difficult to find on the map that in the middle and lower reaches of the Yangtze River, the Anqing section of the Yangtze River tends to go south, and after passing through Anqing, it flows north. Comparing it to the "throat" is very vivid. The downstream can reach Suzhou and Shanghai, and the upstream can reach Hanyu.

If the Yangtze River is regarded as a dragon, then the mouth, eyes, throat, chest and abdomen of this dragon can correspond to Shanghai, Nanjing, Anqing, Wuhan and Chongqing respectively, so the ancients said that Anqing is "the Yangtze River with a long throat"