The roadside picked up a few pieces of discarded wood, which can be taken back to do manual work. I found a saw and prepared to divide the wood into several pieces. First, I put the wood on the table, hung one end of the wood out, pressed the wood on the table with my left hand to prevent it from moving, held the saw in my right hand, sawed the piece of wood up and down, saw the piece of wood hanging outside for a while, and asked my friend to help, when I observe his movements, I press one end of the wood with one hand and saw the wood with the other hand. His behavior can make the same movements as mine without thinking. If a sharpening stone is added to the wood and their experience of sawing wood is borrowed, when they sharpen the knife, they are just like sawing this piece of wood, and their movements can be carried out without thinking. This product model uses the symbol of wood, make a small opening at the other end of the wood and add a replaceable sharpener. The replacement heads of the sharpener are divided into three types: rough grinding, fine grinding and rib grinding. The materials are respectively diamond grinding heads, tungsten steel alloy and aviation ceramics. Users can replace the wood-shaped sharpener according to their own needs and put it in the kitchen. Even if the saw is replaced with a kitchen knife, people can use it naturally, or three pieces of sharp whetstone material are set on one end of the wood at the same time for users to use. What other behaviors can you observe for sawing wood? You may as well share them with us.