What tree is this smooth trunk?

Lagerstroemia indica also has a name, called skinless tree.

Alias itch tree and hundred-day red. It is a small deciduous tree, belonging to the family Celosiaceae, with a height of 10 m, smooth bending of branches, and a large amount of bark peeling in autumn and winter. Branchlets slightly quadrangular. The leaves are opposite or nearly opposite, oval, entire, sharp at the apex, wide and round at the base, smooth and hairless on the surface, and hairy on the back of the leaves along the midvein. The flowers are clustered at the top of the branches in a conical shape, and the perianth is dry and bright red. Pink or white. ? After the new bark, the old bark falls off, so the trunk is smooth. In summer, the trees are full of flowers with panicles at the top. Each flower has six petals, which shrink like crepe. It is called "Ziwei" in English. Colors are white, red, purple, light pink purple and so on. There are irregular notches on the edge and long claws on the base, which is very beautiful. The flowering period can last for 2-3 months.