Peony, which features bright colour and graceful shape, symbolizes peace and prosperity and is thus well recognized as " king of flowers". Peonies are cultivated and grown in many places of China . For thousands of years , a great number of poems and paintings have been produced to praise the flower. In the Tang Dynasty, peonies were planted so widely in the royal gardens as " the national flower" that they enjoyed great popularity across the country. In the 10th century, the ancient city of Luoyang became the centre of peony planting, and has remained as such since then. Nowadays, hundreds of thousands of domestic tourists pour in Luoyang for the annual peony festival, when they can both appreciate the unique beauty of the flowers and explore the history of the city which is known as the capital of six dynasties .