Why is Xiaoshan called sandy land?

Xiaoshan is in Qiantang River, facing Hangzhou. In the past, the traffic was underdeveloped, so the development of Hangzhou was better than that of Xiaoshan. So Xiaoshan is called the country by Hangzhou people. As far as I know, the sand is on the east side, mainly for planting and fishing. With the demolition and so on, I don't think there will be such a name They are all nouveau riche. I won't be poor again, it's just. . . . . .