What is the relationship between Changsha and Xingcheng?

Changsha is nicknamed "Star Sand" because it is said that the city is named after Changsha Star, so Changsha is also called "Star City". The saying of "Star City Changsha" is often heard in the media. Changsha City was separated from Changsha County (1933 Changsha County and its surrounding areas were classified as Changsha City), and Changsha County was later divided into Changsha County and Wangcheng County, so these two counties and Changsha City enjoyed the historical and cultural intellectual property rights of "Xingsha" and "Xingcheng". When Changsha County moved out of Changsha City, it built a new county town on an empty land and named it Xingsha Town, which gave Changsha the nickname "Xingsha" a special geographical position. When Wangcheng County established a new development zone, it actually used the name of "Xingcheng Development Zone" and further established a star town. This is really awkward. When the time comes to talk about Changsha's two nicknames, it actually means something else. Moreover, Changsha County and Wangcheng County will withdraw from the county reform area as a whole in recent years, and they are also prepared to use the name of "Xingsha District and Xingcheng District" ...