- 应运而生 yìngyùn'érshēng to emerge at an opportune time(idiom) To emerge as a result of a favorable situation or to meet a specific demand; originally referring to being born in accordance with destiny, but now used for anything that arises to fit the trends of the times.
- 应运而起 yìngyùn'érqǐ to emerge at the right timeto arise or appear because of a favorable situation; to emerge as the occasion demands
- 应运而出 yìngyùn'érchū emerge as required by circumstancesto arise at the opportune moment or when the situation demands it; to emerge at the right time