After hundreds of millions of years, human beings have evolved from marine organisms to Human sapiens. The fish in rivers, lakes and seas should be close relatives of mankind. In Chinese culture, fish is a symbol of good fortune and prosperity. Painters of the past dynasties have sought auspicious signs by painting fish. But today, 171 million tons of fish are caught by people every year. What is even more frightening is that 8 million tons of plastic waste enter the ocean every year and cause 15 million marine life deaths. The harmony between man and nature is one of the essence of Chinese traditional culture. And this value has been abandoned by the billions of people living on this land. I do not seek surplus and auspiciousness in painting fish, but focus on whether people can still get along with nature in harmony?