不平等條約

Etymology
First attested in volume 73 of :

However, the concept of unequal treaty dates back earlier. An instance of referring to treaties as unequal  can be found in an article translated from a Japanese newspaper article and published in  in 1897:

The concept of unequal treaties gained traction towards the conclusion of World War I and was subsequently popularized by in 1923, leading to its widespread usage.

Noun

 * 1) unequal treaty