What are the characteristics of the imperial city in the planning and design of Chang 'an in Sui and Tang Dynasties?

The Imperial City began with the construction of Daxing City in Sui Dynasty, which isolated Miyagi from other areas, thus strengthening the defense of Miyagi. Urban planning and design also make full use of natural geographical conditions. For example, in the east of the capital, there is a so-called "Liupo" Fu Gang Highland that runs through the whole city. In order to achieve the political goal of controlling the square, buildings such as government offices, palaces, temples and Taoist temples were arranged on these highlands, which not only played a supervisory role, but also enhanced the three-dimensional sense of the city. In addition, Furong Garden, Qujiang Pool and other scenic spots are also integrated with the capital, which not only beautifies the city, but also provides places for sightseeing, which is really a great innovation in ancient urban planning.