give mutual help in an emergency; help each other in case (/time) of need ❍ 他们俩保证～，永不失信。Both of them pledged to help each other in case of need and never break their promise.
缓急相助huan ji xiang zhu
help each other in time of need or in an emergency
缓急相助huǎn jí xiānɡ zhù
缓：和缓；急：危急。无论在平时还是在危急时刻都要互相帮助。help each other in case of need, help each other in time of need, give mutual help in an emergency