A thorough observation
Jiazhihucha, a Chinese idiom, Pinyin is Ji ā zh ì h ù ch á, which means to visit every family. It comes from the biography of Hong Fan by Zeng Gong of Song Dynasty.
Idiom usage
Used as a predicate or object; used in dealing with affairs
The origin of Idioms
Zeng Gong's biography of Hong Fan in Song Dynasty said: "a man has a wide world and can't be observed by every family. If he can use his intelligence to be big and far away, he will be able to cover his important position."
Idiom explanation
Go to every house and household.
A thorough observation
be still fresh fresh in one 's memories - jì yì yóu xīn