The gold content of doctoral degrees in the United States is 100%, followed by Britain, with a gold content of about 84%, Japan, 58% and Germany, 44%. The average gold content of Dr. China may be only 10%. Of course, this is the average score, depending on the individual's performance. If the gold content of 1- is water, the water content of Dr. China may be as high as 90%, followed by the German water content of 56%.

The high degree of German doctoral degree reflects the decline of its research ability and education level after World War II. In the ARWU academic ranking in 2009, no German university entered the top 50, but the number of doctors trained in Germany was almost half that of the United States, obviously at the expense of quality for quantity.

There is still a long way to go for local universities in China to surpass the United States in innovation ability. In the near future, a large number of doctors studying abroad can fill this gap.