同船济水 (同船濟水) tóngchuánjìshuǐ

tóngchuánjìshuǐ set phrase to cross a river in the same boat; two enemies provisionally cooperating
Domain: Idiom 成语 , Subdomain: , Concept:
Notes: Variant of 同舟而济 (Guoyu '同船濟水')