- 亘古不变 gèngǔbùbiàn unchanging since ancient timesunchanging since times immemorial; unalterable or unvarying over a long period of many centuries; monotonous
- 亘古未有 gèngǔwèiyǒu unprecedentedunprecedented; never seen before since ancient times
- 亘古通今 gèngǔtōngjīn throughout historyfrom ancient times up to now; throughout all of history