Forensics
The Chinese idiom, Pinyin is Ji à NJ à sh í Bi à n, which means to observe the opportunity and understand the trend. It comes from the book of Jin, a true record of Huangfu.
The origin of Idioms
In the book of Jin, Huangfu Zhenzai Ji: "there is no discipline in the Yan Dynasty, but it can be mapped out. Only Huangfu has a true ear."
Idiom usage
It means to keep abreast of the trend at any time
Forensics
run clandestine errands up and down the line - shàng cuàn xià tiào
support and develop family undertaking - dǐng mén zhuàng hù
soldiers and horses are in great haste -- busily engaged in warfare - róng mǎ kǒng zǒng