How does my country compare with the Southern Song Dynasty?

Economically, it is definitely not as good as the Southern Song Dynasty (the Southern Song Dynasty’s population accounts for about 15% of the world’s population, but its economic aggregate accounts for more than 75% of the world’s total; today, our country’s population accounts for 21% of the world’s population, and its economic aggregate accounts for more than 75% of the world’s total) The proportion is only 7%.), which is much stronger militarily than the Southern Song Dynasty. But compared with the era at that time, technology is now inferior to that of the Southern Song Dynasty. The science and technology culture of the Southern Song Dynasty was leading at that time. At that time, the Southern Song Dynasty was the main country of immigrants, but now it seems that they are all moving out. Moreover, due to the rule of the Manchu Qing Dynasty, China's Han suzerain culture has declined. This has directly led to the two subordinate barbarian countries that have sincerely admired Chinese civilization. Japan and Korea are still biased against China because of the decline of the suzerain culture. Even South Korea and Japan believe that they are the successors of Chinese civilization.