What kind of flower is this?

Alias Jingershu, Hundred Days Red, Full House Red, Pruritus Tree. It is a dicotyledonous plant of Lagerstroemia of Lysimachiaceae. Of southern Asia and northern Australia. It is distributed in East China, Central China, South China and Southwest China, and widely cultivated in various places. Lagerstroemia indica has beautiful posture, smooth trunk and bright colors; When the flowers bloom, it happens to be the summer and autumn season, and the flowering period is extremely long, from June to September, so it is known as "Hundred Days Red" and has the reputation of "summer green covers the eyes and this flower is full of red eyes". It is a good bonsai for ornamental flowers, stems and roots. The main producing areas of Lagerstroemia indica are Jiangsu Changmeihua, Zhejiang, Anhui, Shandong and other places.