as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
generate a list of 5 interesting facts about the great wall of china.
user
1. the great wall of china is over 13,000 miles long.
2. the wall was first built in the 7th century bc by the qin dynasty.
3. the wall was built by over 1 million workers over the course of 2,000 years.
4. sections of the wall have been made from anything from wood to stone to brick.
5. the wall is visible from space with the naked eye.
assistant