- 一成不变 yīchéngbùbiàn set in stone(idiom) unchanging and rigid; used to describe something that remains fixed or someone who stubbornly follows old routines without adapting to new situations
- 一成一旅 yīchéngyīlǚ scanty forcesDescribes having very limited territory and few troops, often used to describe someone who succeeds in reclaiming their former glory or defeating a foe despite starting with such meager resources.
- 一成不易 yīchéngbùyì unchangeablefixed and unalterable; set in stone; remaining the same forever