What to do when a Radermachera sinica keeps dropping leaves? Handle it this way and the leaves will be emerald green and grow fast

There are many reasons why the leaves of a Radermachera sinica drop at the slightest touch. If it is caused by improper watering, you need to water it reasonably to keep the soil moist. If it is caused by improper lighting, you need to adjust the duration and intensity of light, giving it sufficient but not intense light conditions. If it is caused by over-fertilizing, you need to flush the soil or repot it with fresh soil.
1. Water appropriately
Cause: Overwatering can damage the root system of the Radermachera sinica, causing it to shed leaves. Underwatering can also cause its leaves to lack water and drop off.
Solution: Water it reasonably to keep the soil moist, neither too dry nor too wet. When watering, observe the condition of the soil surface; if it is dry, replenish the water, and if it is not dry, you can hold off on watering.
2. Appropriate light
Cause: Too much light will scorch its leaves and cause leaf drop. Too little light will make it difficult for its leaves to carry out normal physiological reactions, which will also cause leaf drop.
Solution: Place it in a spot with ample light. When the light is too strong, shade it appropriately; when the light is too weak, supplement it with artificial light.
3. Flush the soil
Cause: Over-fertilizing at ordinary times can also easily cause its leaves to drop at the slightest touch. This is because the excess fertilizer in the soil cannot be absorbed by it in time and will remain in the soil, harming its root system and causing it to drop leaves.
Solution: Flush the soil with a large amount of water to wash out all the excess fertilizer in the soil, then place it in a cool, ventilated spot to let the soil dry. In more serious cases, consider repotting with fresh soil.