This is the 11626th most frequent Korean word.
난징
"난징" is the Korean name for "Nanjing," a city in China.
Here, '난징' is used as a proper noun to refer to the geographical city of Nanjing, indicating a location.
난징은 중국의 역사적인 도시입니다.
Nanjing is a historic city in China.
In this sentence, '난징' again refers to the city in the capacity of a travel destination.
내 친구는 지난 여름에 난징에 갔다.
My friend went to Nanjing last summer.
Here, '난징' is part of a title, referring metaphorically to historical events associated with the city, thus used in a literary or cultural sense.