This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Nanjing is one of the most beautiful cities of mainland China with lush green parks, natural scenic lakes, small mountains, historical buildings and monuments, relics and much more, which attracts thousands of tourists every year.
Nanjing is considered one of the most pretty cities in what region?