Question: what was the cost of the great wall of china?
Answer: There are nearly 1,000 passes along the Wall, like the famous Shanhaiguan Pass, Juyongguan Pass, and Yumenguan Pass. Based on the above three costs, the total cost of the Great Wall is 531.1 billion + 3.5 billion + 100 billion ≈ CNY 635 billion (approximately USD 95 billion).