Nanking
Part of speech: proper noun
Definition: Alternative and older name of Nanjing.
Nanjing
Part of speech: proper noun
Definition: The capital of the Jiangsu province of eastern China.
Nanking as a proper noun is alternative and older name of nanjing. while Nanjing as a proper noun is the capital of the jiangsu province of eastern china.
Part of speech: proper noun
Definition: Alternative and older name of Nanjing.
Part of speech: proper noun
Definition: The capital of the Jiangsu province of eastern China.
We hope you now know whether to use Nanking or Nanjing in your sentence.