What is letter X city?

Letter X city typically refers to a city whose name starts with the letter "X." One notable example is Xi'an, a major city in China known for its rich history and as the starting point of the Silk Road. Xi'an is famous for the Terracotta Army and its ancient city wall, making it a significant cultural and historical site. Other cities starting with "X" are less well-known, but Xi'an is the most prominent.