The method of using food heating packs is as follows:

1. Activate the food heating package: Remove the food heating package, follow the instructions on the packaging to knead or shake it, fully mix the internal chemicals, and start generating heat.

2. Food placement: Place the activated food heating bag into the food that needs to be heated, ensuring that the bag containing the food is not damaged to prevent chemical leakage.

3. Waiting for heating: Wait for a few minutes, the chemical reaction inside the food heating bag will generate heat to heat the food.

4. Check temperature: After the food heating package is heated, use your hands to check the temperature of the food to ensure that it has reached the appropriate temperature.

5. Take out the food: After the food reaches the desired temperature, take out the food heating bag and enjoy the heated food.

Attention: When using food heating packs, follow the instructions on the packaging to avoid safety issues caused by excessive heating or improper use. At the same time, there may be residual substances in the food heating bag after use, and it should be handled properly to avoid polluting the environment.