Chang 'an and Luoyang were both prosperous cities in the Tang Dynasty. There were many differences between the two. Chang 'an was located in Xi'an City, Shaanxi Province. It was the capital and largest city of the Tang Dynasty and one of the most prosperous cities in the world at that time. Chang 'an was a large city with a complete urban planning. It had many palaces, temples, parks, squares and other buildings. It was the political, cultural and commercial center of the time. In contrast, Luoyang was located in Henan Province Luoyang City Luoyang was another capital and important city of the Tang Dynasty. Luoyang City was relatively small, but the urban planning was very exquisite. There were many ancient temples, markets, and other buildings. It was also one of the important representatives of the Tang Dynasty culture. In addition, Chang 'an and Luoyang were quite different in terms of geographical location, climate, population, economy, culture, and so on. Chang 'an was located in the interior of the country. The climate was dry, cold in winter, and hot in summer. Luoyang was located on a coastal plain with a mild climate and four distinct seasons. Chang 'an had a large population, but its economy was relatively developed. It was the center of handicraft, commerce, and agriculture at that time. Luoyang, on the other hand, mainly focused on agriculture, crafts, and commerce, which were relatively backward. Chang 'an and Luoyang were both prosperous cities in the Tang Dynasty, but there were big differences in geographical location, climate, population, economy, culture and so on.