Why are foreigners so interested in the Great Wall and Terracotta Warriors?

Foreigners have built many magnificent castles. When they meet an intruder, as long as there are enough soldiers occupying the city wall, they can repel the intruder. It never occurred to me to block intruders with a wall. Such a long wall is unimaginable, and even jokes are circulating among each other. Therefore, when they come to China, they must see unimaginable walls. Let's be more or less embarrassed!

As for the Terracotta Warriors, I am really curious and admire them. First, I want to see what people in China were dressed up two thousand years ago. Second, I also want to see the sculpture skills of China people at that time and admire the good skills of the ancients.