What is the purple emblem tree and its photo?

It is a small tree, native to China, and it is a long-lived tree with strong adaptability. Because its tree shape is not high, it is very suitable as a garden ornamental tree and a street greening tree. Lagerstroemia indica has been cultivated in China for thousands of years, and it was planted in Chang 'an Palace in Tang Dynasty. In recent centuries, it has been introduced to all parts of the world, and westerners have discovered this kind of tree from India, so it is called "lilas des Indes" in French.

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