It was bad because peoples' lives were lost during the border wars.
That is why, hope this helps. :)
The voyages of Zheng he, development of blue and white porcelain, and the establishment of the forbidden city are all associated with the: Ming Dynasty
Zheng he held the position as the fleet admiral during the Ming Dynasty and became the first Chinese mariner that opened up the map from China to South East Asia. During this period, Ming Dynasty also created a city that's exclusively resided for Nobles and High Government official called the Forbidden city.
C. Severely damaged the country's air, water, and soil.
