Do propaganda slogans in China use metaphors?

Chinese characters are the basic symbols of China culture, and they are like a mirror, reflecting the life of ancient people in China. The charm of China characters is really touching. Mr. Yu Guangzhong once said: "As long as Cang Xie's inspiration does not die, as long as the beautiful China people are not old, the image and magnetic centripetal force will always exist." The seemingly dull square characters can combine such a beautiful artistic conception, which makes people sigh the wisdom of Cang Xie and the greatness of Chinese characters.