- 两国之间 liǎngguózhījiān between two countriesbetween the two countries; bilateral
- 两国关系 liǎngguóguānxì bilateral relationsrelations between two countries; diplomatic or state relations between two nations
- 两国相争，不斩来使 liǎngguóxiāngzhēngbùzhǎnláishǐ do not execute envoys(idiom) when two countries are at war, they should not execute messengers or envoys sent from the other side
