The urban spirit of Nanjing is "openness, honesty, freedom, entrepreneurship and innovation". The city tree of Nanjing is cedar, and the city flower is plum blossom. The symbol of Nanjing's tourist city is "Dragon Pan and Tiger Ju". Nanjing is one of the four ancient capitals in China, with a history of 500,000 years of human activities, nearly 2,500 years of city construction and about 450 years of capital construction, enjoying the reputation of "the ancient capital of the Six Dynasties" and "the Ten Metropolis".