Why does the phone heat up when charging/shutting down after the phone is locked?

Solution:

Fast charging will be accompanied by a certain amount of heat, which is normal. Although the charging temperature is high, it is within the safety standard and can be used with confidence. It is recommended that you expose the phone to the air when charging, reduce the contact and wrapping of clothing and other fabrics, and ensure a good heat dissipation environment, which can effectively reduce the temperature.