Tā tiāntiān bǎ gǎigé guàzàizuǐshàng, què cóngbù xíngdòng.
He keeps reform on his lips every day, but never takes action.
Tips
memory
Picture words literally 'hung' on someone's lips - they never leave, but never get acted on. Often slightly critical: real action would mean 落实 (putting into practice).
