After the Sino-Japanese War of 1894-1895, Cixi, as the real ruler, still didn't wake up from the fantasy of going to China, thinking that her dynasty was the most powerful, so she made a joke to challenge other countries, but the Qing Dynasty did have a certain position in the feudal dynasty at that time, although it was still there. How to say that the Qing dynasty was all-powerful in the feudal dynasty at that time for hundreds of years, and ordinary small countries dared not hit people when they were down.
Secondly, Eight-Nation Alliance was really strong and overbearing at that time, and would not tolerate other countries without strength to share benefits. A country divided by eight countries has unlimited ambitions, and the cake is so big that it is already very helpless. Of course they all want more. These eight countries were decided by the finals. Britain, Russia, Japan, France, Germany, Italy and Austria were the earliest capitalist countries and the most powerful countries at that time.
The declaration of war by various countries brought Eight-Nation Alliance's aggression against China to a certain extent, causing serious humiliation and losses. To some extent, it also gave other countries the illusion that thin camels are bigger than horses, and also shocked those nameless countries to some extent. So it only attracted Eight-Nation Alliance to invade China, not eighteen or more allies.