have a good opinion of oneself
Chinese idiom, Pinyin is Z ì sh ì sh è ng ā o, which means to think highly of oneself (mostly refers to status, knowledge, etc.). It's from 20 years of witnessing.
The origin of Idioms
Chapter 36 of Wu Jianren's twenty years of witnessing the strange situation in Qing Dynasty: "I think this man thinks highly of himself. It seems that the writing is always good, so it is not strong."
Idiom usage
It is used as predicate and attributive, mostly referring to status, knowledge, etc. People who think highly of themselves will be taken in.
have a good opinion of oneself
get without any labor without doing any work - bù qín ér huò