How do the leaves in Wei Zi bonsai curl and shrink?

The leaves of Ziwei bonsai are curled and shrunk, which may be caused by the high climate temperature and the rapid evaporation of water in the leaves. If the climate is too dry, it will become curly. You can save the leaf by spraying some water on it with a watering can. It is also possible that the soil is too airtight for water to penetrate into the root system, and its root system can't breathe, so the leaves will shrink and curl. You should turn over the flower soil in the basin to keep the soil moist.