不知天高地厚

not to know the immensity of heaven and earth / an exaggerated opinion of one's own abilities

no; not so / (bound form) not; un-

not to know / unaware / unknowingly / fig. not to admit (defeat, hardships, tiredness etc)

to know / to be aware

day / sky / heaven

surname Gao

high / tall / above average / loud / your (honorific)

highland / upland

-ly / structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct

earth / ground / field / place / land / CL:片[pian4]

thick / deep or profound / kind / generous / rich or strong in flavor / to favor / to stress