What does it mean to "meet each other late and bury the enemy with one gun"?

It means that the feud between two people gradually fades after time running-in, and when they meet again, they smile at each other. The past is all floating clouds and dispersed.

The original text is from Lu Xun's poem Sanyi Tower.

The original sentence is that the wave-snatching brothers are here, and when they meet, they laugh and forget the enmity. It means that when we have all experienced disasters, the friendship between brothers still exists. When we met, we smiled at each other and forgot all the past hatred.

This is a seven-character poem that sings about things and sends feelings. This is also a reward poem recited at the request of a friend. This poem by Lu Xun, the author, borrows a small concrete thing-a pigeon and a tower mound built for burying pigeons, which gives birth to a huge and profound theme, exposes the aggression of Japanese imperialism against the Japanese people, strictly distinguishes the Japanese people from Japanese imperialism, and points out that the two peoples are as close as brothers, indicating that with the passage of time, the Chinese and Japanese peoples will continue to be friendly until they are "robbed".

The seven-character poem that wrote this poem shows such a huge and profound theme, which not only fully explains the author's vision and mind, but also fully shows the author's profound artistic skill: examining the object of the poem, discovering the implied meaning, and expressing feelings vividly and naturally. This poem is both realistic and romantic; It can also be said that this poem is a resounding and inspiring hymn to internationalism.