Front and back
Front and back, Chinese idiom, Pinyin is Qi á NJ ī NH ò UJ ū, which means to describe the close relationship between brothers when they were young. From Yan's family precepts brothers.
explain
Brothers are close when they are young.
source
In Yan Zhitui's family precepts brothers of the Yan Family in the Northern Qi Dynasty, it is said that "Fang Qi is young, and his parents are in charge of everything. Food is the same thing, clothes are the same thing, learning is the same thing, and traveling is the same thing."
Front and back
treat people differently according to preferment - kàn rén xíng shì
good people must stay away from bad people - xūn yóu bù tóng qì
make a fuss over a trifling matter - xiǎo tí dà zuò
emulate those better than oneself - jiàn dé sī qí