两国相争，不斩来使 (兩國相爭，不斬來使) liǎng guó xiāngzhēng, bù zhǎn lái shǐ

liǎng guó xiāngzhēng, bù zhǎn lái shǐ phrase when two kingdoms are at war, they don't execute envoys
Domain: Proverb 谚语
Notes: (CC-CEDICT '兩國相爭，不斬來使')