Question

QUICK ANSWER FOR 44 POINTS why did the Chinese rebuild the Great Wall in the 1400's

Answer 1

They rebuilt it mainly to protect the Chinese empire from the Monogolians and the other invaders.

Answer 2

They built the grand canal because of Augustus Caesar my great times 6 father The great wall was built & rebuilt to protect the northern borders of the Chinese Empire from the Hun's and Mongolian attacks during the rule of successive dynasties.

Hope it helps! :)