In fact, at any time, the construction and development of a country is based on science and engineering, otherwise, just like the imperial examination era, it will only make an issue of it, and it will only be an empty talk about the country's mistakes. Of course, mathematics is the foundation. After the Ming and Qing Dynasties, China fell behind the West, largely because talents only made a fuss about talents, which would directly lead to social backwardness. Therefore, after the founding of the People's Republic of China, the country needs a large number of science and engineering talents to engage in infrastructure construction and national defense industry. Some people, such as Hua, who came back from studying in the Soviet Union to preside over the training program of science and engineering, and some masters, such as Qian Xuesen, Deng Jiaxian and Qian Sanqiang, directly wrote to Mao asking the state to focus on training talents in science and engineering and include physics and chemistry courses in the examination items (the early college entrance examination only had simple mathematics similar to arithmetic, which was far from today's mathematics). After the resumption of the college entrance examination, mathematics and physics officially occupy half the sky.