Which city is called the constellation?

Nanjing, China is called "the city of constellations". Nanjing, located in the southeast of China, is one of the famous historical and cultural cities in China, and also one of the important science and education centers and modern cities in China. Nanjing has many famous scenic spots and landmarks, such as Sun Yat-sen Mausoleum, Confucius Temple and the Ming Tombs. Nanjing also has a unique astronomical culture and is one of the earliest cities in China to carry out astronomical observation and research. Nanjing's observatory and astronomical museum are very famous, attracting a large number of tourists to visit. Nanjing is called "the city of constellations".