Why go to Yangzhou?

Generally, going to the north is to go up, going to the south is to go down, from west to east, from east to down, especially the train line is more professional.

Lower Yangzhou originally meant that Emperor Qianlong often took a cruise to Yangzhou along the canal. The emperor usually calls it down when he goes out for a patrol, so the next Yangzhou comes from this!

Another allusion is Li Bai's Farewell to Meng Haoran on the way to Yangzhou. Fireworks go down in Yangzhou in March. Because the Yangtze River is divided into upper and lower reaches and Yangzhou is the lower reaches, it is called going down from Wuchang to Yangzhou.