"Slow-simmering porridge" is a metaphor to describe a dull and lasting love. In this fast-paced era, people tend to pursue instant passion and excitement, and are unwilling to pay patience and energy, while porridge simmered with a small fire represents feelings that flow slowly, and they don't give up easily or go with the flow. Therefore, "simmering porridge with small fire" is used to describe the slow cooking of love in order to achieve a long-term love effect.