In the eighth century AD, the world was full of changes and unrest, and on the East Asian continent, the Tang Dynasty was experiencing a prosperous 14th year of Kaiyuan.Under the clear and shining dome, the Tang Dynasty is moving poetically. Sima Rui, the king of Langya, and his best friend Wang Dao, after experiencing the ups and downs of the country, went south to establish a new political power, which extended the political and cultural roots of the Central Plains, and ushered in a new great revolution in the south.Development, the civilizations of the north and the south were deeply integrated, and China's history adjusted the focus of writing. Mo Zhai, who was born a commoner, had an unusual love and study of mechanical technology and natural science.He was once a follower of Confucius, but gradually became a critic of Confucianism.In Mozi's case, Confucianism's flashy concepts are not conducive to social development. Only sophisticated instruments that can be widely used can better meet the needs of the times.