Question: which chinese dynasty did the most work on the great wall
Answer: The Han ( 202 BC -- 220 AD ) , the Northern Qi ( 550 -- 574 ) , the Sui ( 589 -- 618 ) , and particularly the Ming ( 1369 -- 1644 ) were among those that rebuilt , re-manned , and expanded the Walls , although they rarely followed Qin 's routes .