如虎添翼

lit. like a tiger that has grown wings / with redoubled power (idiom)

as / as if / such as

tiger / CL:隻|只[zhi1]

to add / to increase / to replenish

surname Yi / alternative name for 絳|绛[Jiang4] capital of the Jin State during the Spring and Autumn Period (770-475 BC)

wing / area surrounding the bullseye of a target / to assist / one of the 28 constellations of Chinese astronomy / old variant of 翌