1840 or so, China is still the strongest country in the world. After all, the first industrial revolution was still going on, and only Britain and France were stronger in the world. Slavery had not been abolished in the United States at that time, and there were only more than 30 States in the territory. At that time, Germany and Italy split, which had little international influence. Russia did not change the serfdom at that time, and there were many domestic contradictions, not to mention Japan, an unknown small eastern country.

This situation changed around 1858. Britain confirmed its status as an empire, followed by France, and the United States greatly increased its territory and liberated slaves. It can be said that it is also on the rise.

Germany and Italy are still divided, and Japan is still closed to the outside world. No major changes have taken place in these three countries.

Russia was defeated in the Crimean War at that time, so China's international status was relatively high before 1840.