两国争斗，不杀对方派来的使者。
when two kingdoms are at war, they don't execute envoys (idiom)
两(liǎng)
国(guó)
相(xiāng xiàng)
争(zhēng)
()
不(bù fǒu)
斩(zhǎn)
来(lái)
使(shǐ)
