The origin and ancient and modern changes of the name of Xiangyahu?

After Yangzijin lost the Yangtze River Ferry, it was connected to Yilou River (Guazhou Canal) in the south and Yiyang River in the north, and it was still a hub of land and water transportation. Yang Di has opened the Beijing-Hangzhou Canal (Tianjin Bridge) which runs through the Yangtze River. At this time, the town of Yangziqiao has been quite large. After Yang Guang, Emperor Yang Di, lucky in Jiangdu, chose Yangzi Bridge as the attached capital, built a palace and a Linjiang Palace, which is famous for its uterus. There are Ninghui Hall and Zhu Xuanting in it, which is really magnificent.

From the second year of Daye to February of 13th year (606-6 17), Emperor Yang Di visited Linjiang Palace of Yangzi Bridge for three times, especially the Ninghui Hall of Linjiang Palace for the third time, where he gave a big banquet and arranged operas for fun. His happy mood can't be expressed in words.

Yangziqiao Town is not only paved with Linjiang Palace, but also has a large number of merchants, so the market should be prosperous. By the Tang Dynasty, street towns had formed a certain scale. Therefore, in the first year of Yongchun in Tang Gaozong (682), Yangzi Town in Jiangdu was designated as Yangzi County. As the capital of Yangzi County, Yangzi Town is more prosperous.

Yangzi Town, the capital of Yangzi County, is also located on the main waterway across the river from Jingkou, and governs the postal drive department. Therefore, the land and water post station was set up here, named Du Linyi, also known as Yangzi Post, in order to prepare officials from south to north and messengers to deliver official documents, and to transfer ships, chariots and horses here.