Wúqī túxíng shì jǐncì yú sǐxíng de zuì yánlì chǔfá.
Life imprisonment is the most severe punishment after the death penalty.
Tips
grammar
无期 means 'without a fixed term' and 徒刑 means 'imprisonment'. In Chinese law, 无期徒刑 doesn't literally mean forever — inmates may be eligible for parole after serving a minimum period.