How did the Great Wall of China impact China?

First it has protected Chinese people for centuries. Because in the ancient time, Chinese people in the northern part were frequently attacked by the Huns (a minority whose people were very good at riding and lived to the north of China). With the help of the Great Wall, Chinese warriors were more likely to protect their land and people.

Secondly, the Great Wall's birth was created by Chinese people's wisdom and the hard work. To an extent, the Great Wall forced the technology to develop and then to serve the building process.

Thirdly, in my opinion, the Great Wall also brought a negative impact on Chinese people. Thinking about the protection of the Great Wall, sometimes Chinese people relied too much on it and therefore they did not pay much attention to training the army but focus on the entertainments.

But after all, the Great Wall is China's pride. It units them. You can find the "Great Wall" in China's national anthem.