about 5 hours and 46 minutes.
according to Ctrip. com, it takes about 5 hours and 46 minutes to take the G1321 high-speed train from shanghai hongqiao railway station in Shanghai to Changsha South Station in Changsha, and the fare is 478 yuan.
The famous scenic spots in Changsha are: Yuelu Mountain, Orange Island, Window of the World, Xiangjiang Happy City, Hunan Provincial Museum and Beizheng Street. Changsha's delicious food includes: Changsha stinky tofu, golden orange cake, double-flavored wings, chopped Chili with lobster sauce, goldfish playing lotus and so on.