臻 (w)

(zhēn) to arrive; to reach (esp. perfection); utmost; (used in commercials)

臻于完善 (w)

(zhēnyúwánshàn) to attain perfection (idiom)

臻于郅治 (w)

(zhēnyúzhìzhì) to attain a state of perfect governance (idiom)

臻至 (w)

(zhēnzhì) excellent; top