What plant is the rose safflower on the roadside in Suzhou?

Lagerstroemia japonica, Lagerstroemia arborescens.

Lagerstroemia indica, also known as Bairihong, Begonia Tree and Cherry Tree, is native to China and belongs to Lagerstroemia of Lysimachiaceae. According to historical records, it has a history of 1500 years. It is an important flowering tree species in summer in China, with long flowering period and gorgeous colors.

Lagerstroemia indica is widely used in garden construction and has broad development prospects. It is usually planted on both sides of buildings, courtyards, Chi Pan, rivers, lawns and park trails. Now it is widely used in flower belts of street trees and urban roads, or as bonsai. The planting value forms are generally single stem, cluster stem and short stem, which are reasonably matched and complement each other to achieve the best effect.