This is the 452nd most frequent Chinese word.
长沙
Changsha (a city in China).
In this sentence, 长沙 is used as a proper noun, referring to the name of a city in China.
我计划这个周末去长沙旅行。
I plan to travel to Changsha this weekend.
Here, 长沙 is employed to describe the source or location of something, indicating the city known for its notable cuisine.
长沙的美食非常有名，特别是臭豆腐。
The cuisine of Changsha is very famous, especially stinky tofu.
长沙 in this sentence specifies the location where a person has lived, personalizing the context of the individual's connection to the city.