Is the Great Wall of china built in the ancient times?

Yes, Emperor Qin Shi Huang ordered to build the Great Wall during the Qin Dynasty. The wall has been restored and extended in later dynasties.

thank you dude

The [almost] complete history is that the wall comprised of many other walls built by farmers over a few hundred years. Then Qin Shi Huang (huang meaning emperor, not part of his birth name) united the Chinese feudal states under the Qin Dynasty into the country we now call China (the phrasing used by the Chinese today is "zhong guo ren" pronounced (zd/ch)ong guo lit meaning is middle country.) Emperor Qin then order much of China's product to increase defenses against foreign enemies and built up the wall. Then he tried to find the answer to immortality and ate a ton of mercury, which if you didn't know, it's highly poisonous.

IT was actually Qin Shi Huangdi

In China, we call him either Qin Shi Huang or Shi HuangDi(Shi means "the first" and "Huangdi" is the word he made up himself, meaning emperor). We use Qin Shi Huang most often. And we also call his name 嬴政ying zheng(ying is the family name while zheng is the first name)