Can Lagerstroemia indica live if its trunk cracks?

I can't. Cracking indicates that the water shortage is serious and it has dried up. When Wei Zi enters winter, it must be watered enough to protect the frozen roots of Wei Zihua tree. Because of the protection of water, the roots can keep constant temperature, and will not freeze due to the sudden drop of external temperature, which can achieve good anti-freezing and cold-proof effects.