If you cannot open the can, you can use the following methods:

Use a can knife: A can knife is a tool specially used to open cans and can be purchased in supermarkets or kitchenware stores. Insert a canning knife into the slit of the can and twist firmly until the can is completely open.

Use a can opener: A can opener is also a tool specially used to open cans and can be purchased in supermarkets or kitchenware stores. Clamp the can opener's tab onto the can lid and turn firmly until the can is completely open.

Use a hammer and screwdriver: Insert the screwdriver into the edge of the jar lid, then tap the screwdriver gently with the hammer until it gradually penetrates the jar lid, and finally opens the jar lid completely.

Soak in hot water: Soak the can in hot water for a few minutes, then wrap the can with a towel and twist the lid firmly until the can is completely opened.

It should be noted that you must be careful when opening the can to avoid injuring your fingers. If it cannot be opened, do not use too much force to avoid the can breaking and spilling food.