Food is divided into stocks and corrosion. The main food is rice, and soup and side dishes are divided into corrosion. Stock represents the main job or subjective work, action or thought, and corrosion is a symbol of minor incidental work or work related to the main work. If you open a rice cooker to eat and there is no rice, it means that your main job will disappear. In other words, it is symbolic that business may go bankrupt, retire from work, or run out of work and become economically destitute.