Preparation tools: kitchen knife, canned food. * * * is divided into three steps, and the following is the detailed operation of can opening:

1. The blade root is placed on the edge of the tank cover. The root of the knife is the thickest part of the blade, which ensures the stability of the knife and will not slide.

2. Move the knife to press out the hole. After pressing a small hole, move it a few centimeters closer to the edge, and then open the hole in the same way.

3. Continue to operate until a hole is opened around the tank cover.