Tā quàn liǎng jiā rén huàgāngēwéiyùbó, héhǎo rúchū.
He urged the two families to make peace and restore their old friendship.
Tips
history
From 《淮南子·原道训》: the legendary Yu the Great dismantled walls, burned weapons, and spread virtue — ten thousand states then came bearing jade and silk (玉帛) as tribute.
culture
干戈 = weapons of war (shield and dagger-axe); 玉帛 = jade and silk, traditional diplomatic gifts. The contrast is a standard shorthand for war vs. peace.