What is famous about the city of Xi'an in China?

Xi'an is particularly famous for being home to the 8,000 terra cotta warriors, which are a significant archaeological discovery and a UNESCO World Heritage site. These life-sized statues were created to accompany the first Emperor of China, Qin Shi Huang, in the afterlife, symbolizing the emperor's power and the great artistic skills of the time. The terra cotta army was buried near the emperor’s tomb and was discovered by farmers in 1974, leading to considerable interest from historians and tourists alike. The site's historical significance, artistic value, and the sheer scale of the find have made Xi'an a key cultural and historical representation of ancient China's rich heritage.

The other options, while they may refer to different aspects of Xi'an or other cities in China, do not capture the essence of what makes Xi'an uniquely renowned on a global scale.