一手遮天

lit. to hide the sky with one hand / to hide the truth from the masses

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

a skill / mastery of a trade / by oneself / without outside help

hand / (formal) to hold / person engaged in certain types of work / person skilled in certain types of work / personal(ly) / convenient / classifier for skill / CL:雙|双[shuang1],隻|只[zhi1]

to cover up (a shortcoming) / to screen off / to hide / to conceal

day / sky / heaven