A frog in the pond was caught and placed in a warm water tank. It was delighted with the comfortable environment. It didn't have to avoid the invasion of wind and rain and worry about the baking of the sun. It calmly indulged in the warm water. Its dream had long been forgotten. Its light body became bloated and its flexible feet became clumsy. Until one day, it realized that it was about to become a Chinese meal for mankind, so it regretted it.