Scientific "Mr. De and Mr. Sai" is the image of democracy and science, and it is also the two flags in China's new culture movement. Among them: "Mr. De" means "democracy", which means "democracy", and the so-called "democracy" refers to democratic thoughts and politics; "Mr. Sai" means "science" and "science". The so-called "science" refers to the laws and spirit of modern natural science.