The Great Wall that we are familiar with today... stone walls with battlements etc., was built between the 14th and 17th centuries and really isn't comparable to the ancient "wonders of the world". There is also much debate about the wall being visible from space. I won't go into all the details here, but wikipedia provides a good introduction.
I guess I am more familiar with Chinese history than you. The Great Wall was built in the Qin Dynasty (around 3th century BC). The later parts of the wall was built in 14th century in Ming Dynasty. It was built because there were battles between states so Qin Shi Huangdi built it in order to defend his state from the attack of the others. Is it ancient enough?
Yes I am well aware of the wall's history. What I am suggesting is that the original wall, which is no longer visibile (it was essentially a large earthwork rampart), was not nearly as impressive as its more modern counterpart. I hardly find a rammed earth barrier to be equivelant (no matter how long and effective it may have been) to the other 'wonders' in cultural grandness and/or engineering achievement.
okay I understand. It's my mistake, I have misunderstood your viewpoints. Just trying to make a suggestion, since I am a Chinese and I would like to help to build the name of my own nation.