hows and whys
The first and last reason is an idiom, pronounced sh ǐ m ò Yu á NY ó u, which means "the course and cause of things", also known as "the first and last reason".
interpretation
The whole story: the whole story. Cause: the cause. What happened and why. It is also called "the beginning and the end".
source
In Yuan Dynasty, Ma Zhiyuan's Qingshan tears, the fourth fold: "you should not deceive Yin, but tell us the whole story in detail."
Examples
The ninth chapter of Chen Lang's snow moon plum in Qing Dynasty: "where does this daughter-in-law dare to hide, she has to tell the whole story straight."
Chinese PinYin : shǐ mò yuán yóu
hows and whys
The natural endowment of the lake. bēi hú bǐng liáng
used figuratively for studying hard. chuān bì yǐn guāng
treat able men and scholars with the greatest courtesy. jìng xián zhòng shì