Solutions for a large number of fallen leaves when white magnolia (Michelia alba) overwinters indoors

Main reasons for a large number of fallen leaves when white magnolia (Michelia alba) overwinters indoors:
① The room temperature is too high, or the room temperature fluctuates suddenly high and low;
② Improper watering, with the potting soil alternating between dry and wet;
③ Doors and windows are kept too tightly closed, and the indoor air is excessively dry;
④ The room temperature is too low;
If, when the white magnolia (Michelia alba) first begins to drop leaves, you immediately identify the cause of the leaf drop and treat the specific problem, it can still be remedied. The remedies are as follows:
① Keep the room temperature at 5-10°C and provide appropriate light;
② Do not water arbitrarily; when the potting soil is dry, water appropriately;
③ When the weather is warm, pay attention to opening the windows frequently for ventilation, and spray water indoors regularly to maintain air humidity.