How to identify Lagerstroemia indica

Wei Zi, also known as Hundred Days Red. This thing prefers warm and humid, generally more in the south. But I didn't know it was so valuable. There is a famous king of Wei Zi in Guizhou. This cow is amazing and is worshipped as a god by local people. That's also a batch of red cloth and incense paper. It is said that it can cure all diseases, but I don't know whether it is true or not. Why, brother, if you want to buy it, you should find an expert to help you. China's hype has always been unreliable.