Why is Changsha called sand turtle and furan? Why is it also called Star City? (answer the first one emphatically)

Changsha has a long history, with a recorded history of over 3,000 years. It is the first batch of historical and cultural cities in the State Council and the first batch of excellent tourist cities in China. In ancient times, it was "the important town of Chu, the famous county of Qin and the capital of Han", and the name "Changsha" was first seen in Yizhou Book in the Warring States Period. It is recorded in the book that there is something called "Changsha Turtle" in the tribute to Zhou Wang. The square objects were named after place names, indicating that Changsha was quite famous at that time. Turtle, commonly known as "foot fish" in Changsha, is also a common aquatic fish in the market. It is a delicious food that nourishes the body. There are two main explanations about the origin of Changsha's name: ① The most popular explanation comes from historical records? The astrology in the official book says that "there are stars in the sky and nations on the earth". According to the ancient stars, this place in the sky corresponding to Changsha is Changsha. Historical records also say that Changsha Star is the birthday star, and Changsha Xingming is the land of longevity. People who have been to Changsha live a long life. This is the origin of Changsha being called "Star City". Therefore, everyone present here must be blessed and live a long life in Changsha. Another way of saying it is geology. In the name of geomorphological features, there is a sandy land in the narrow strip of Xiangjiang River Valley. It is also based on facts that Changsha is called "Shaxiang" in ancient books. Now there is the largest urban inland sandbar in the middle reaches of Xiangjiang River in Changsha. According to legend, the sand was once as long as meters, hence the name Changsha.

By the way, I'm not sure about your second name. Can you tell me?