A friend is a friend
The presence of a general on the front line. It's the same as "being the target".
Idioms and allusions
[source] Chapter 32 of romance of the Three Kingdoms by Luo Guanzhong of Ming Dynasty: "if you are still in love, you will be killed in conflict." [example] the first chapter of Xue Gang's anti Tang written by Julian in Qing Dynasty: "recruit a group of our friends, fight south and North, wipe out the East and West, fight for nine years, level one and six, then form a unified country."
Discrimination of words
It's a very brave person
A friend is a friend
be good both in character and scholarship - jīng míng xíng xiū
Prosperity always leads to failure - shèng bì lǜ shuāi
an exalted discussion and extensive statement - chóng lùn hóng yì
outlast even the heaven and the earth - tiān lǎo dì huāng
store up goods to make a good bargain - tún jī jū qí