求各位大神学霸帮忙检查一下这篇文章里的语法或者单词错误等等谢谢啦

求各位大神学霸帮忙检查一下这篇文章里的语法或者单词错误等等谢谢啦
The Great Wall
The Great Wall of China is one of the wonders of the world. All the work was done by hand.It’s in Beijing.
Now, let me introduce more about the Great Wall to you.
The great is more than 2000 years old. The Great Wall first comes from the time of the Qin Dynast，Shihuangdi of the Qin Dynasty united china 221 BC.He wanted to against the huns.So he ordered slaves to build the Great Wall.Then the Great Wall has experienced many dynasties.And now the Great Wall has become a place of interest.Every year a lot of tourists come to visit the Great Wall.The Great Wall has a lot of parts.
1. "North Pass" of Juyongguan pass, known as the Badaling. Made of stone and bricks from the hills, this portion of the Great Wall is 7.8 meters high and 5 meters wide.
2. “West Pass” of Jiayuguan . This fort is near the western edges of the Great Wall.
3. "East Pass" of Shanhaiguan. This fort is near the eastern edges of the Great Wall.
I think the Great Wall is a wonder becauseThe Great Wall took a long time to build and it was very magnificent.The Great Wall is the symbol building of China.
Former American president Nixon said, after he visited the Wall, that only a great nation could build such a great wall.
Now the Great Wall has become a place of interest. We all know the famous Chinese saying: “He who does not reach the Great Wall is not a true man.”

The Great Wall of China is one of thewonders of the world. All the work was done by hand. It’s in Beijing.
Now, let me introduce more about the GreatWall to you.
The Great Wall is more than 2000 years old.It was firstly built in the Qin Dynasty after Shihuangdi unified China in 221BC. He wanted to defend against the northern nomads. So he ordered the slavesto build the Great Wall. Then the Great Wall experienced many dynasties. Andnow the Great Wall has become a place of interest. Every year a lot of touristscome to visit the Great Wall. The Great Wall has a lot of parts.
1. "North Part" of Juyongguan,known as the Badaling.， is made of stone and bricks from the hills, this section ofthe Great Wall is 7.8 meters high and 5 meters wide.
2. “West Part” of Jiayuguan . This fort isnear the western edges of the Great Wall.
3. "East Part" of Shanhaiguan. This fort is near the easternedges of the Great Wall.
I think the Great Wall is a wonder because theGreat Wall took a long time to build and it was very magnificent. The GreatWall is the symbol building of China.
American ex-president Nixon once visitedthe Wall, “Only a great nation could build such a great wall.’’ he said.
Now the Great Wall has become a place ofinterest. We all know the famous Chinese saying: “He who does not reach theGreat Wall is not a true man.”