1. The heating time of different charge is different, and the initial temperature in different areas is also different, which makes it impossible to specify the heating time of charge in microwave oven.

2. Suggestion: First cut a small hole in the upper corner of the charge and heat it for 40 seconds to observe the situation. If it is cold, continue to heat 10 seconds or 20 seconds; If it is overheated, it can be reduced by 5 to 10 second next time.