“不可同日而语” Bù kě tóng rì ér yǔ
The two cannot be mentioned in the same breath
“不可同日而语”，literally”(two things) cannot be mentioned in the same breath”, is used metaphorically to mean that there is no comparison between two people or two things because of the significant difference. For instance, in terms of science and technology, there is no comparison between the past and the present.
Chinese is very easy to learn, Want to know more, check out on our other posts to learn more.
1-on-1 live Chinese course, learn with Chinlingo Chinese,
apply a free trial: https://www.chinlingo.com/how-it-works/