星移斗轉

1. • lit. the Big Dipper 北斗星 běidǒuxīng has turned and the stars have moved
2. • time flies

Character by character

• 星(xīng)star
• 移(yí)move
• 斗(dǒu)dry measure for grain equal to ten 升 shēng or one-tenth of a 石 dàn
• 轉(zhuǎn)turn