It seems to me that the use of 'in' rather than 'of' is better in the sentence below but I am struggling to explain why.
It presents a change in China's role in the Middle East.
It presents a change of China's role in the Middle East.
English Language Learners Stack Exchange is a question and answer site for speakers of other languages learning English. It only takes a minute to sign up.Sign up to join this community
a change in something:
All of the above imply an existing thing in which a change occurs.
All the above imply that the nouns (heart, scenery, clothes) are replaced by another object of the same category.
It represents a change in China' role in the Middle East.
is idiomatic. If the repetition of "in" bothers you stylistically, you can try
It changes China's role in the Middle East.
If you are really talking about symbols, so "represents" is necessary, you can try
It represents China's changed role in the Middle East.
Edited to correspond to the edited question.