How did the foreign-contact policies of three medieval Chinese dynasties affect China

Throughout the Ming Dynasty China had open and closed door policies which made them prosper and fall. ... These foreigners were called the Uighurs, and they were restricted because they were attacking the borders of China.

Explanation:

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what the first or next guy says

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.